429 Back Pressure
Junior User
Joined: Dec 2000
Posts: 50
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429 Back Pressure
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.
