big block to small block

[malibu795]

Why not fix the 454? The flexplate may be different. Do you know if it's internal or external balance? What year sb are you planning on installing?

bolt patterns are identical.. at least of the Gen IV BBC and 2 piece SBC(gen 1/2?)

i havent seen a factory ineternal balance BBC

BBC(454) are external and have more weight out there then a SBC 400

kinda off the track there

[VileZambonie]

Why not fix the 454? The flexplate may be different. Do you know if it's internal or external balance? What year sb are you planning on installing?

bolt patterns are identical.. at least of the Gen IV BBC and 2 piece SBC(gen 1/2?)

i havent seen a factory ineternal balance BBC

BBC(454) are external and have more weight out there then a SBC 400

kinda off the track there

So are you saying the 454 is the only bbc? And are you saying sbc are not also internal and external balance? Totally confused on what you're trying to say here 

[malibu795]

same the bolt pattern between the flex plate and crank are the same between the two engines.

the two main diferences is 153/168t and balance set up.

pending how tight money si one could cut the weights off a BBC flex plate and zero it out.... still probly be cheaper to bu a jegs/summit
knock off flex plate

[Torque454]

Got full length headers on my 79 C10 w/ 454. They are even cheapies from oreillys. Only problem I am having is that I cant get a straight pipe off  the headers into my muffler on the drivers side because there is no hump in the crossmember. The headers fit just fine otherwise tho, I removed the spark plugs and pushed the headers up from the bottom. Didnt have to lift the engine up or anything.