LS6 was originally a BBC. For some dumbass reason gm keeps recycling engine nomenclature for completely different engines. lt1 is another example at least they were both sbc's hell even l99 was a mid 90's 4.3 v8 now it is the new camaro motor.

 

Big block 454 when I was young I had this car in White, with the same lame saddle colored interior.

But it was quick!

 

perhaps dear old uncle is confused with his engine designations im willing to bet someone told him its the "corvette block" (4 bolt mains big deal) and then uncle instead of thinking lt4 or something, he thought ls6

i dont know

 

maybe lt4 block with lt1 heads?????

or ls6 with ls1 heads?

this is a funny thread..would not read again

 

Aren't the LT4 block and LT1 block the same?

 

Yes assuming the LT1 block is a 4 bolt main type.