At some point a 500 I have is going into my 80 Fleetwood.Do the larger old style manifolds fit between the frame rails? I'm also considering changing the flanges off a set of BBC headers.Does anyone know which model Chevy tubes fit the Caddy without major hassle?
I have had the same question in the back of my mind for a few weeks now, since I've started to rebuild a 500 I boutgh and put it in my 1981 Fleetwood.
Yeah I remember reading about that bolt problem too. Other options I'm told would be to install 472 exaust manifolds, or keep the ones of my 368. I guess these Manifolds are supposed to fit but I don't imagine we would get good flow out of them.
kinda sounds like putting a potato in your exaust pipe don't it?
Freak,it sounds like we got similar projects in the works.There is no way those scrawny 425/368 manifolds are going on my car.It's a potato effect for sure.I've noticed Chevelle headers are the same for all years 64 to the end.I'm leaning in that direction.I think I might have a pair somewhere in the archives.It's probably going to come down to stuffing them in there when swap time comes,and if it looks like a go,getting some flanges.Trouble is,I'll be lucky to get it in before winter due to all the dumb responsibilities of life.I've also got a 70 472 which I'm thinking of using,it's just the extra coin for the octane.These relatively light cars oughta go like a scalded dog with those engines,and nobody will ever suspect until you leave 'em in a cloud of smoke. Post an update when you get yours going,it sounds promising.Good luck.