5.0 vs 5.8 swap! - Pirate4x4.Com : 4x4 and Off-Road Forum

JOHNS351C · 03-29-2003, 07:58 AM

I found a crack in my 5.0 block that is in my rig and after sourcing out a used 5.0 block A guy pulled up to the shop and asked if I had any use for a 94 5.8 out of a truck. He only wants a couple hundred bucks for it. He did say it has a burnt valve, but the engine it needs to replace is a 87 5.0, will the heads swap over? Also does anyone know the physical dimensions that are different between the two? My truck has the floor built around the engine and if it is much bigger it will not fit.
Thanks for any help,
John

JOHNS351C · 03-29-2003, 07:59 AM

here is another to give an idea of what space I have.

John Deere Ranger · 03-29-2003, 09:02 AM

302 27-1/2 Inches 20-3/4 Inches 18-3/4 Inches
351W 27-1/2 Inches 23-3/4 Inches 21 Inches

Length width and height

JOHNS351C · 03-29-2003, 09:26 AM

Are the heads interchangable?

So it is 3"wider and 2-1/4" taller
is the height all abover the motor mounts or is some of it below the mounts?

The way it sound it isn't going to work for me

Is the 5.8 that much more powerful? Or can easily get a comparable amount of power out of the 5.0?
John

shons b2 · 03-29-2003, 09:51 AM

heads are a little taller which makes the intake a little wider. you get tq from the 351.
shon

MikeW · 03-29-2003, 11:14 AM

The 302 and the 351 have about the same horsepower, but the 351 has more torque probably cause it has a longer stroke.

John Deere Ranger · 03-29-2003, 06:05 PM

the height is *I belive* above the motor mounts not below

Oatmeal · 04-07-2003, 07:44 PM

To use the 5.0 heads on your 351 you'll have to have the head bolt holes enlarged. The 5.0 use 7/16" bolts vs the 5.8's 1/2" bolts I'm not sure about chamber volumes though, other than that they'll bolt on.

Oatmeal · 04-07-2003, 07:47 PM

Quote:

Originally posted by shons b2
heads are a little taller which makes the intake a little wider. you get tq from the 351.
shon

It's not the heads that are taller it's the deck heighth thats taller, placing the heads higher and farther apart.

injectedEB · 04-08-2003, 08:53 AM

from the pictures it looks like your 5.0 intake is partially under your firewall - if that is the case, then the 351W will not fit - at least not with EFI - the top of the efi intake will be at least 1 or 2 inches taller than the 5.0.

on the plus side the '94 351 block is a roller block so you can easily use a roller cam.

For the heads, as stated above, you'll need to re-drill the head bolt holes for them to fit - however I would upgrade the heads. The 302 heads are already low flowing heads for a 302, on a 351w they will starve it for air some. For the low dollar route, get a set of GT40P heads and some port work, or a set of world heads. To really wake it up get a set of Canfield 18 degree or AFR 185s.

saber6 · 04-08-2003, 02:04 PM

The 351 heads are the way to go. They fit nicely on the 302. You'll use a 302 intake because the 351 is to wide (as stated above from a taller deck height). You can use the same 302 head bolts but the better route is to get collard head bolts (they have a wider shank at the top of the difference in the hole size of the 351 heads, available through ARP I believe). I put 351W heads on my 302 in my '95 Ranger and they were perfect. It doens't look liek you'll have room for the whole 351W motor though.

03-29-2003, 07:58 AM	#1 (permalink)
JOHNS351C Registered User Join Date: Nov 2001 Member # 8282 Location: Wisconsin Posts: 1,125	5.0 vs 5.8 swap! I found a crack in my 5.0 block that is in my rig and after sourcing out a used 5.0 block A guy pulled up to the shop and asked if I had any use for a 94 5.8 out of a truck. He only wants a couple hundred bucks for it. He did say it has a burnt valve, but the engine it needs to replace is a 87 5.0, will the heads swap over? Also does anyone know the physical dimensions that are different between the two? My truck has the floor built around the engine and if it is much bigger it will not fit. Thanks for any help, John Attached Images __________________ [SIZE=4][COLOR=DarkOrange]Stazworks[/COLOR][/SIZE] [B]The leader in Custom Double Beadlock wheels[/B] On SALE NOW [COLOR="DarkOrange"][SIZE="2"][I]20x14's[/I][/SIZE][/COLOR] Due to NEW tooling we can now build std. 1pc 20x14's, and up to a 20x25's without banding! [COLOR=DarkOrange]www.STAZWORKS.com[/COLOR] (715) 333-RIMS,(7467) shop number (715) 333-7250 office John Staszak-owner

03-29-2003, 07:59 AM	#2 (permalink)
JOHNS351C Registered User Join Date: Nov 2001 Member # 8282 Location: Wisconsin Posts: 1,125	here is another to give an idea of what space I have. Attached Images __________________ [SIZE=4][COLOR=DarkOrange]Stazworks[/COLOR][/SIZE] [B]The leader in Custom Double Beadlock wheels[/B] On SALE NOW [COLOR="DarkOrange"][SIZE="2"][I]20x14's[/I][/SIZE][/COLOR] Due to NEW tooling we can now build std. 1pc 20x14's, and up to a 20x25's without banding! [COLOR=DarkOrange]www.STAZWORKS.com[/COLOR] (715) 333-RIMS,(7467) shop number (715) 333-7250 office John Staszak-owner

03-29-2003, 09:02 AM	#3 (permalink)
John Deere Ranger Registered User Join Date: Apr 2002 Member # 11111 Location: Spartanburg, SC Posts: 1,019	302 27-1/2 Inches 20-3/4 Inches 18-3/4 Inches 351W 27-1/2 Inches 23-3/4 Inches 21 Inches Length width and height __________________ 1987 John Deere Edition Ranger Dana 60 Sterling 10.25 Rear 5.0 HO/ZF/NP203/NP205 Secretary of Navy Gideon Wells wrote n his diary that Lincoln "thought it essential to provide an asylum for a race which he had emancipated, but which could never be recognized or admitted to be our equals."

03-29-2003, 09:26 AM	#4 (permalink)
JOHNS351C Registered User Join Date: Nov 2001 Member # 8282 Location: Wisconsin Posts: 1,125	Are the heads interchangable? So it is 3"wider and 2-1/4" taller is the height all abover the motor mounts or is some of it below the mounts? The way it sound it isn't going to work for me Is the 5.8 that much more powerful? Or can easily get a comparable amount of power out of the 5.0? John __________________ [SIZE=4][COLOR=DarkOrange]Stazworks[/COLOR][/SIZE] [B]The leader in Custom Double Beadlock wheels[/B] On SALE NOW [COLOR="DarkOrange"][SIZE="2"][I]20x14's[/I][/SIZE][/COLOR] Due to NEW tooling we can now build std. 1pc 20x14's, and up to a 20x25's without banding! [COLOR=DarkOrange]www.STAZWORKS.com[/COLOR] (715) 333-RIMS,(7467) shop number (715) 333-7250 office John Staszak-owner

03-29-2003, 09:51 AM	#5 (permalink)
shons b2 Registered User Join Date: Aug 2000 Member # 1481 Location: blue lake,CA. USA Posts: 1,102	heads are a little taller which makes the intake a little wider. you get tq from the 351. shon __________________ researching my next mistake....

03-29-2003, 11:14 AM	#6 (permalink)
MikeW Registered User Join Date: May 2002 Member # 11975 Location: Bemidji Posts: 2,230	The 302 and the 351 have about the same horsepower, but the 351 has more torque probably cause it has a longer stroke.

03-29-2003, 06:05 PM	#7 (permalink)
John Deere Ranger Registered User Join Date: Apr 2002 Member # 11111 Location: Spartanburg, SC Posts: 1,019	the height is I belive above the motor mounts not below __________________ 1987 John Deere Edition Ranger Dana 60 Sterling 10.25 Rear 5.0 HO/ZF/NP203/NP205 Secretary of Navy Gideon Wells wrote n his diary that Lincoln "thought it essential to provide an asylum for a race which he had emancipated, but which could never be recognized or admitted to be our equals."

04-07-2003, 07:44 PM	#8 (permalink)
Oatmeal Registered User Join Date: Oct 2002 Member # 14600 Location: Covina,Ca. Posts: 1,010	To use the 5.0 heads on your 351 you'll have to have the head bolt holes enlarged. The 5.0 use 7/16" bolts vs the 5.8's 1/2" bolts I'm not sure about chamber volumes though, other than that they'll bolt on.

04-08-2003, 08:53 AM	#10 (permalink)
injectedEB Registered User Join Date: Apr 2001 Member # 3959 Location: ~Denver, Colorado Posts: 555	from the pictures it looks like your 5.0 intake is partially under your firewall - if that is the case, then the 351W will not fit - at least not with EFI - the top of the efi intake will be at least 1 or 2 inches taller than the 5.0. on the plus side the '94 351 block is a roller block so you can easily use a roller cam. For the heads, as stated above, you'll need to re-drill the head bolt holes for them to fit - however I would upgrade the heads. The 302 heads are already low flowing heads for a 302, on a 351w they will starve it for air some. For the low dollar route, get a set of GT40P heads and some port work, or a set of world heads. To really wake it up get a set of Canfield 18 degree or AFR 185s. __________________ -Ben '74 Bronco - some assembly required... one of these years I'll drive it again..... When did common sense become uncommon?

04-08-2003, 02:04 PM	#11 (permalink)
saber6 Registered User Join Date: Oct 2002 Member # 14135 Location: Fort Drum, NY Posts: 359	The 351 heads are the way to go. They fit nicely on the 302. You'll use a 302 intake because the 351 is to wide (as stated above from a taller deck height). You can use the same 302 head bolts but the better route is to get collard head bolts (they have a wider shank at the top of the difference in the hole size of the 351 heads, available through ARP I believe). I put 351W heads on my 302 in my '95 Ranger and they were perfect. It doens't look liek you'll have room for the whole 351W motor though.

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