Gen 6 454 w/ factory carb RPO L29 RPO L2111
10-20-2023, 08:55 PM
#1
2nd Gear
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Gen 6 454 w/ factory carb RPO L29 RPO L2111
Hello Im Brand new to this forum. I'm seeking Chevy gen 6 engine knowledge. I recently purchased a gen 6 454 from a 2001? motor home. I have verified it's a gen 6 because of 6 bolts in a "molded timing cover"
It has 4 bolt mains, a 1 piece rear oil seal and machined pad for a mechanical fuel. Here's where it gets strange, it has a carb and fuel pump and an HEI ignition sytem. It has standard flat tappet lifter, but provisons for roller tappets. Has anyone seen this before?
Engine casting # 12550313 Engine serial # T1G23M687 other block cast #J266
Crankshaft cast # 10114188 indicates a cast crank yet has signs of forging marks?
Cylinder casting # 10114156 indicastes open chamber 113cc are these the peanut heads?
Unsure if RPO code L29 ir RPO code L21 or perhaps neither? Both those rpo's indicate mfi and individual
coils per cylinder. An L21 decription speaks of forged crank, and rods.
It has an TH400 with park brake at tail shaft.
Any help would be appreciated
Brian
It has 4 bolt mains, a 1 piece rear oil seal and machined pad for a mechanical fuel. Here's where it gets strange, it has a carb and fuel pump and an HEI ignition sytem. It has standard flat tappet lifter, but provisons for roller tappets. Has anyone seen this before?
Engine casting # 12550313 Engine serial # T1G23M687 other block cast #J266
Crankshaft cast # 10114188 indicates a cast crank yet has signs of forging marks?
Cylinder casting # 10114156 indicastes open chamber 113cc are these the peanut heads?
Unsure if RPO code L29 ir RPO code L21 or perhaps neither? Both those rpo's indicate mfi and individual
coils per cylinder. An L21 decription speaks of forged crank, and rods.
It has an TH400 with park brake at tail shaft.
Any help would be appreciated
Brian
01-14-2024, 02:21 PM
#2
Burning Brakes
Hi Brian, welcome !
I believe you may have a Gen 5 and not a Gen 6, or even a sort of hybrid of the two (Mortec lists it as a " '91 & up block gen v , or gen vi bare block with fuel pump provisions") , heads are '91 & up peanut port 118cc heads (non-vortec). Crankshaft is " '91 & up cast 454".
This would all be more similar to a '91 to '95 L19 spec engine, especially when including the flat tappet cam.
I believe you may have a Gen 5 and not a Gen 6, or even a sort of hybrid of the two (Mortec lists it as a " '91 & up block gen v , or gen vi bare block with fuel pump provisions") , heads are '91 & up peanut port 118cc heads (non-vortec). Crankshaft is " '91 & up cast 454".
This would all be more similar to a '91 to '95 L19 spec engine, especially when including the flat tappet cam.