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Discussion Starter · #1 ·
I bought an '80 4x4 truck over the weekend and If I'm not mistaken didn't 80s come with 20Rs? The valve cover clearly states "22R" on the front... Are there any distinguishing characteristics that tell me if it's a 22R?

Oh yeah, I paid $500 for it... <IMG SRC="smilies/biggrin.gif" border="0">

It's a longbed, 5-speed(?) with AC, tilt steering, vent and sliding rear window, buckets, tach, etc. Possible trail toy ala Chris G... It's even Yellow!
 

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The 20R intake manifold is different. If you removed the intake manifold, the head would have round ports instead of square. If I remember correctly the 20R manifold has smoother turns from carb to head and the 22R's runner are more square. The valve covers are the same so the 22R sticker doesn't mean anything. I don't have a pic to show you but if you posted a pic of the intake manifold I think I could tell you if it was a 20R or 22R. The manifold's do not interchange.
 

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One distinguishing point is the carb. The 20R has a round topped carb and a 22r has a square topped. Also the starters are different (smaller) but thats kinda hard to tell. Also the 80 didn't have a 5 speed. Look at the tranny and see if the shifter sits kinda side sattle or if the shifter is strait down the middle . Also look and see if the T-case shifter is on the t-case or the tranny. That helps ID the trans. Did you buy it off Chris G?
 

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The 22R are marked on the driver side of the block There should be a machined flat surface with 22R engraved on it. Y ou may have to wipe awaythe buildup.
 

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Discussion Starter · #5 ·
Well... mystery solved. The engine sticker under the hood says "22R" in a few places. Guess I should have looked closer.

I bought the truck from a buddy that has a car dealership, it was a trade-in they were going to wholesale. I mentioned Chris G cause it looks like his when he started "Trail Toy"...

I would post a pic but I haven't had time to take any yet.

Thanks for the assistance....
 

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What Sargeant Kajo and techman said! and on the side of the block...can't remember which, but I believe the driver's side, it's cast or stamped, "20R" or "22R"

I once hauled a very greasy 20R over several cars, through poison oak, and halfway up a hill in 100 degree weather before we realized that it was 'only' a 20R!!!! DOH!

[ 10-22-2001: Message edited by: Nate C ]
 

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That sucks, Nate!!! <IMG SRC="smilies/smile.gif" border="0"> <IMG SRC="smilies/frown.gif" border="0">
 

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Originally posted by msahr:
<STRONG>I bought an '80 4x4 truck over the weekend and If I'm not mistaken didn't 80s come with 20Rs? The valve cover clearly states "22R" on the front... Are there any distinguishing characteristics that tell me if it's a 22R?
</STRONG>

The 81 'California emmissions' trucks had 22R's, so maybe the 80 did too and your is a 'California' truck?
 

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Chad,
Hehehe...it was fun <IMG SRC="smilies/biggrin.gif" border="0"> Learning everyday!

BTW the hood may not be the original...use it as a guide unless you're sure. What month and year of mfg??? 8 or 9 of 80 maybe considered an 81. 10 of 80 is definitely an 81.


81 is supposed to be first year of 22R in trucks, which is one reason (also the external side shifted tranny) I bypassed several older trucks at purchase time.
 

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I recently bought an 80. Build date of 8/79...one of the first 80's <IMG SRC="smilies/biggrin.gif" border="0">

Be careful, cause I think I have a hybrid motor. On the drivers side of the block above the engine mount there is a machined pad that has 22R stamped on it.
I think I might have a 20R head, though.....

I heard something about 4 studs along the bottom of the exhaust manifold vs 5.....cant remember if that was difference between 20 & 22R heads, or just early & late 22R's.........
Sorry....maybe someone else will confirm.....

& yes, I was told by a reliable source on Sunday, that Jim Brink confirmed that 20R's were used till 80, 22R's in 81.

[ 10-23-2001: Message edited by: Cracker ]
 

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I recently bought an 80. Build date of 8/79...one of the first 80's <IMG SRC="smilies/biggrin.gif" border="0">

Be careful, cause I think I have a hybrid motor. On the drivers side of the block above the engine mount there is a machined pad that has 22R stamped on it.
I think I might have a 20R head, though.....

I heard something about 4 studs along the bottom of the exhaust manifold vs 5.....cant remember if that was difference between 20 & 22R heads, or just early & late 22R's.........
Sorry....maybe someone else will confirm.....
 
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