My low compression 440 build

I think I may buy some tri-y headers. I was hoping to save a buck and keep it quiet but I am not interested in chasing down mismatched old manifolds that would then need modification and still restrict my exhaust flow. I just thought if i could throw on the ones off my other motor I would just do that.

I am going to pick up my tranny tomorrow and I just found out it supposedly has a 73 440 atached to it out of a c- body car. Maybe that motor would be better that the 78 motorhome 440....both are supposed runners...