I Have a set of cylinder heads with the castings 93417369 and I can't find any infromation on them. I know for sure that they were made in mexico (Hencho en Mixico). Is that good or bad? I found some information saying that casting #'s 33417369 are to 90-up 350 Gen. 1 Good wrench Crate motor, but I don't have center bolts and the first number is definatly a 9. http://www.nastyz28.com/ubb/confused.gif Also my block (which I got from a different place then the heads) have castings 3970010 which I know is a 350 with 4 bolt main, but it was also made in Mexico. What kind of blocks did GM get from Mexico? Any help would be well appreciated.

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Thank You,

Matt Hanson
79 Camaro 355 Th400
mild cam, ported heads, edelbrock intake, 750 cfm carb, headers 2 1/4" Dual exhaust with flowmaster 3 chamber 50 series mufflers, shift kit

33417369...90-up...350..........Gen.I Goodwrench crate motor,
"Hecho en Mexico", 76cc

the block doesn't have to be a 4 bolt could be a 2 bolt 010 block

The heads arn't 90-up though because they don
't have the center bolts. They bolt down aroud the edge like all pre 86. the firs number is clearly 9. I'll try to get a picture.

Just because it is a 90-up casting does not mean it must have center-bolt valve covers (Vortec heads). Keep in mind that this is a service replacement engine (not factory installed in any cars), designed for replacement of Generation I small blocks, i.e. early design...it was just built in the 90's. It's the same motor I would get right now if I were to purchase a stock replacement GM Goodwrench 350 to replace my 76LT 350 from GM.

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