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Old 05-23-2006, 06:23 PM
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Small Block ID Help

I'm hoping you can help me out with this. Bought a short block from an LT1 "350" last week, mostly for the block itself. My plan is to bore and stroke it into a 383 for my Nova project. When I got it home and measured the bores (which still have most of the cross-hatch showing) they were 4.029-4.030 already. Cool! Then I got to looking at the pistons and they don't look stock. I'm wondering it I got a 383 short block just by dumb luck??

Here's what they look like.......

Block: 2 bolt. serial number 14093638 (My guide says 88-92 small block, nothing else)

Crank: I don't really have a way to measure the extra 1/8 inch throw without dropping it back in the block, and I don't have the bearings yet (it came in boxes, already apart). I will try posting pics to see if anyone recognizes it. On the counterweight nearest the nose is stamped "350" and either "AY" or "^Y" (supposed to be delta Y). On the counterweight nearest the seal is cast in "8535" or maybe "3585" ... hard to tell.

Pistons: Do not look like stock 350 flat-tops, at least not from a '71 engine. Have a slight dish with valve reliefs as well. "Hecho en Mexico" and "2774228" stamped inside. Also have a notch in the raised land around the dish.

I would REALLY appreciate any help you can give in IDing these things.

Dave
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Old 05-23-2006, 06:55 PM
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Looks like it was an el-cheapo rebuilt 350. At least the block's not already 0.060 over.

Those pistons scare me.


Larry
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Old 05-23-2006, 07:28 PM
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Quote:
Originally Posted by bluesman123
I'm hoping you can help me out with this.
I would REALLY appreciate any help you can give in IDing these things.

Dave
None of those two numbers match a listing I have ...
go here ... for a list ...

http://www.mortec.com/cranks.htm
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Old 05-23-2006, 07:54 PM
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The pistons look like plain old cast low compression 350. A quick way to check the stroke is to measure from the center of the main journal to the center of the rod journal and double the measurement. Chances are you have a 350 since an 88-92 engine would require an aftermarket crank to make a 383.
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Old 05-23-2006, 09:07 PM
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14088535 305 85-89 Truck One Piece Rear Main Seal
14088535 350 86-89 Truck One Piece Rear Main Seal
14088535 305 86-89 Pass,Camaro,Monte Carlo,Malibu One Piece Rear Main Seal
14088535 350 87-88 Camaro,Corvette One Piece Rear Main Seal
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