460 rebuild question - Pirate4x4.Com : 4x4 and Off-Road Forum

Mr. Greenjeans · 10-02-2008, 02:38 PM

I've got a '70's 460, and a '71 429. The crank in the 460 is bad, but the rest of the block has only about 300 miles on a complete rebuild.
The crank in the 429 is good.

I know that the 2 cranks are interchangeable, but my question is can I just take out the 460 crank and put in the 429 crank with a new set of bearings (in the block that's currently a 460)? Or do I have to have something done to the 429 crank to make the rods and mains not get eaten up.

Thanks,
-Brian

cumminstech_1 · 10-02-2008, 05:28 PM

If the crank pins and mains are the same diameter then all you have to do is get the bearing clearance right. Also I think the 429 crank has a shorter throw than the 460 so longer rods may be needed.

cant remember if it was diffrent bore or stroke.

wyldstallyn73 · 10-02-2008, 05:45 PM

460 and 429 have the same rods.

you will need to match your pistons with the cranks.

Mr. Greenjeans · 10-02-2008, 06:17 PM

The pistons are different? Crap. I assumed they were the same.

Just for the sake of knowledge, assuming I had 2 460 cranks (both balanced internally), could I swap them in the same engine with only a bearing change?

cumminstech_1 · 10-02-2008, 08:24 PM

sure

10-02-2008, 02:38 PM	#1 (permalink)
Mr. Greenjeans Registered User Join Date: Jun 2003 Member # 20544 Location: Memphis, Tn Posts: 20	460 rebuild question I've got a '70's 460, and a '71 429. The crank in the 460 is bad, but the rest of the block has only about 300 miles on a complete rebuild. The crank in the 429 is good. I know that the 2 cranks are interchangeable, but my question is can I just take out the 460 crank and put in the 429 crank with a new set of bearings (in the block that's currently a 460)? Or do I have to have something done to the 429 crank to make the rods and mains not get eaten up. Thanks, -Brian

10-02-2008, 05:45 PM	#3 (permalink)
wyldstallyn73 Registered User Join Date: Dec 2004 Member # 40162 Posts: 1,454	460 and 429 have the same rods. you will need to match your pistons with the cranks. __________________ "Time you shut your cake-hole, YOKO!!!"

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10-02-2008, 05:28 PM	#2 (permalink)
cumminstech_1 Registered User Join Date: Apr 2008 Member # 112640 Location: Oldenburg IN. Posts: 110	If the crank pins and mains are the same diameter then all you have to do is get the bearing clearance right. Also I think the 429 crank has a shorter throw than the 460 so longer rods may be needed. cant remember if it was diffrent bore or stroke.

10-02-2008, 06:17 PM	#4 (permalink)
Mr. Greenjeans Registered User Join Date: Jun 2003 Member # 20544 Location: Memphis, Tn Posts: 20	The pistons are different? Crap. I assumed they were the same. Just for the sake of knowledge, assuming I had 2 460 cranks (both balanced internally), could I swap them in the same engine with only a bearing change?

10-02-2008, 08:24 PM	#5 (permalink)
cumminstech_1 Registered User Join Date: Apr 2008 Member # 112640 Location: Oldenburg IN. Posts: 110	sure