I have a 1971 429 with '73 460 heads and it has been rebuilt to 9.5:1 compression, and an rv cam, high volume oil pump and the rest was done stock. Since the heads are stock I was wondering about a set of headers I was offered cheaply. They fit the truck and have 1 7/8 primaries with 3" collectors and I was wondering if this is too much header for a street truck and daily driver. Will I have enough back pressure if I use these headers so that i don't ruin my heads? Would purple hornies glasspacks, 30" long give it healthy back pressure or are there better ones out there to solve my problem? or will any muffler like a glass pack or a bottle be good enough? Thanx for any help.

 

1 5/8 primaries would be better with 2.5 collectors but the ones you have should work ok too. would use flow masters, banks or gibson mufflers.

Proford