I am about to purchase some Spintech long tube headers, and I was wondering which ones y'all thought would best fit my combo.
It is going to be a 3.79 stroke, all forged bottom end, iron heads (flowing somewhere in the 290 range), matching custom cam, 4bbl M1 or Indy 360-3m intake, with somewhere around 13-15 psi boost with a D1SC Procharger.
Do I really need the 1 7/8 primary headers, or will the 1 3/4 primaries be sufficient? I am asking because, the 1 3/4 are $100 cheaper (not a huge deal if it's needed), and they will provide slightly more clearance.