A new motor for the GMC will not any longer be a GMC motorhome. I
understand what you are trying to come up with. But, stop and think a
minute. The 455 block that was made for the GMC is an "L" block. So what
you say. Well these letters denote the nickel content in the block. The
GMC people who originally made these things put the best of the entire world
into them. An "L" block should probably never ever need to be bored out to
a larger piston. This may sound strange but the piston bore will wear out
the rings and probably need replacement rings. The steel cranks are the
same way. New roller lifters and the other parts can add to the engine such
as the fuel injection once you are over the mark (California) for age. The
distributors can be recurved and replaced. There are many other things we
can talk about. But unless you are completely dissatisfied with what you
have you might really consider reconsidering. After all now, most GMC
people are into preserving the GMC not radically changing them. Or have I
missed the mark (again) I know International, Western States and the clubs
locally all have to preserve the GMC. Chuck in Lompoc, Ca. 78 Eleganza II
understand what you are trying to come up with. But, stop and think a
minute. The 455 block that was made for the GMC is an "L" block. So what
you say. Well these letters denote the nickel content in the block. The
GMC people who originally made these things put the best of the entire world
into them. An "L" block should probably never ever need to be bored out to
a larger piston. This may sound strange but the piston bore will wear out
the rings and probably need replacement rings. The steel cranks are the
same way. New roller lifters and the other parts can add to the engine such
as the fuel injection once you are over the mark (California) for age. The
distributors can be recurved and replaced. There are many other things we
can talk about. But unless you are completely dissatisfied with what you
have you might really consider reconsidering. After all now, most GMC
people are into preserving the GMC not radically changing them. Or have I
missed the mark (again) I know International, Western States and the clubs
locally all have to preserve the GMC. Chuck in Lompoc, Ca. 78 Eleganza II
