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GM Fastburn, vortec, LT1 and LT4 were all kind of chasing the same port and combustion chamber design.
But they were limited by 50 year old valve placement, 50 year old cylinder head bolt placement, intake to head mating (well vortec and LTx have their own intake) and a few other things.
GM was chasing the mythical MPG and hosepower unicorn with those designs.
But couldn't nail it.
It wasn't untill the newer 2007+ LS serries came out that GM took every thing they leaned they coldn't do with on the SBC format and finely used it to build the engine they always wanted and only then they were able to catch up to that unicorn and and run him over...
Maybe some one could post a pic of what that might look like.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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