The hole in the manifold itself is a bottleneck for any throttle body over 70mm anyway, gains for these have always been placebos, "big gains" is ridiculous unless you had a clogged air filter beforehand. The C&L/75mm combo I briefly had before I spun a rod bearing and parted the motor for the 4V swap was imperceivable to the stock 70mm SVO(F150) throttle body on the factory plenum... which was imperceivable to the stock 65mm... Throttle response changes some, there's more oomph with less pedal input, as you'd expect, but wide open throttle the performance is the same, the real restrictions are in the heads and the plastic manifold itself.
It looks damn good though, but buy used and buy cheap(under $100). For the near $300 these things retail for you can buy a damn PI engine from a junkyard these days.
If your cougar is a 95 and currently stock you need a 96+ or PI intake manifold and the various vacuum/fuel lines/misc items to use any of it.
Last edited by XR7-4.6; 11-02-2017 at 11:34 AM.