Inliners International Forums General Discussion Engines 78 chevy g-20 engine ID

Brien,
Sounds like you have a 292. Good. While I'm not perfectly expert on the later motors, I seem to recall hearing that some 292s made for commercial applications did not have the integral cast manifold head but were issued from the factory with the older style head. Did the original owner of your van run it in a fleet or a delivery service? If so, you may have the original head after all. I think the castin #s for the head are on the passenger side vertically, between a couple of plug holes. Good Luck,
Brian

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'71 GMC Jimmy 350, sm465, np205,3.73 posi.
'68 C/10 Stepside 292 (.030 over) Offy I,Holley 390,Clif ex, sm465, 3.73 posi.
'67 K/10 454 project.
'72 K/5 rolling frame project.