Good idea on the 2x6's.
Found the date code on the engine, J268. Translated it means the engine was cast on Oct 26 of the year ending in a 8.
I'm going to guess it's a 1978 as it appears Chevy stopped putting the 250 in USA vehicles in 1984.
It also a possibility that it's the one year only LD4 version 250 and I don't know if thats good or bad LOL.
The block casting code appears to be 473483 which isn't in any database I could find online and the serial number stamped on the block distributor boss is F1031TAJ which I couldn't cross ref either. I think the TAJ means it came out of a truck which could mean that the intake is for a 2bbl. but thats a guess at this point. I'll have to pull the carb to know for sure.
Atleast I'm pretty sure it's a 250 since it has the integrated head and intake manifold. (which may be bad in it's own right).
It'll be a couple days before I can get back on it but the plan is still to get it running as is then go from there. I can definitely see removing all the smog crapola and perhaps putting a nicer valve cover on it.
