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I'm looking for full length headers that will work with my 1991 F-250 4x4 w/ a 351W and C-6 trans.
The problem is that I need at least 1 5/8" primaries....so I think the Lightning route is the way to go. I don't think the axle or the suspension will cause interference....It has 8" lift with leaf springs and a 3" body lift which will set the firewall a bit higher.
Does anyone foresee any problems with the compatibility?
It's hard to say with a 4x4, but i'd suggest going with a set that has 1 3/4 primaries.
Intercooled Vortech, Victor Jr. heads, roller cam, 62lb injectors, 2800 stall converter, Eaton Locker, Pickrel Headers and Exhaust, FMS Mass Air using SCT tuning software. Road trip and dragstrip ready!
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