OK I wouldn't bother anyone with this. But after many, many hours of research, and reading through all the literature I had, or could get my hands on. I'm stumped. frown
I've got a '64 Chev C20 with a 292. The nose of the crank got bent by someone in it's past. I drove it just the same for some 8 years -- you'd be surprised how hard it is to find
any sixty-something (292) core blocks anywhere. Anyhow. My younger brother picked up a '66 C10 from someone on Southern California that claimed the engine was a new Mr.
Goodwrench crate motor. My brother got the thing for the body, and told me to come over, and we could do an engine swap over the weekend -- sweet, a free engine with
free help. Of course I came over, and badda-bing, badda-boom. We managed the whole thing in a leisurely 6hrs. (lots of breaks, and other non-work related interruptions). smile

So. Here's the thing; I've been driving this thing for awhile. I tried to install an HEI in it without success -- coughed, and sputtered no matter where the timing was,
except at idle. So scrapped that idea, and bought a brand new mechanical distributor, and plugs. Had no idea what the year was, so guessed at 1974.

So here in lies the problem -- I have no idea what year this thing is. Even tho the mechanical distributor, and plugs worked. It has nowhere near the performance
my original 292 had -- even with the bent nose on the crank! So I'm fairly sure it's not the 74 I imagined it might be.

What I know; it is a Mr. Goodwrench crate motor.
[img]http://boltbucket.org/StoveBolt/GOODWRENCH-292_930x508.png[/img]

It is HECHO EN MEXICO (MADE IN MEXICO)
[img]http://boltbucket.org/StoveBolt/HECHO-EN-MEXICO_1328x747.png[/img]
[img]http://boltbucket.org/StoveBolt/89-HECHO-EN-MEXICO_1328x747.png[/img]

It has a serial number cast in the block (GM 4.8 liter 6, sn: 93411147)
[img]http://boltbucket.org/StoveBolt/303-GM-4.8L-6-93411147.jpg[/img]

HOWEVER, and here's the real problem; I can't find anything referencing this number -- nowhere! frown

Any thoughts, links, tips, or brilliance you'd care to share on this, would be GREATLY appreciated!

Thank you! smile

Last edited by Detroit Iron; 09/03/2019 1:58 AM.

'64 Chev C20 LWB stepside (Ol'Blue)