FWIW, I have a 408 stroker, 9.6:1 with Edel RPM's, 1 5/8 hookers, 3" exhaust, 236I242E .545 lift hyd roller, Dana 60 w/3.73's and (at the time) 727 with a 4000 stall 9.5" converter. TQ 850.
Both of the below intakes have been gasket matched with some plenum work.
I had the M1 single plane on...