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Mac 351w longtube headers hit floor board

6322 Views 32 Replies 7 Participants Last post by  408foureye
I mocked up my drivetrain and found the pass side collector hitting the floor board. Driver side looks fine. When I measure the collector height from the ground, the pass side sits up 1" higher, which is causing the floor board interference. The headers are 1 3/4 Mac longtubes on a 351w with convertible mounts. I also bolted up the headers with the engine block and heads on the stand - the collectors are still uneven by the same amount. Anyone else have this issue?
1 - 3 of 33 Posts
Almost sounds like you got one 351 header and one 302 header.
Send them back COD.
They are just collecting dust now along with the matching Prochamber.
Wanna sell them?
1 - 3 of 33 Posts
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