Join Date: Jul 2001
Location: sydney..Australia/Morrinsville New Zealand
The truck style lowers seem to work with boxed uppers...On forced induction..."Maybe" the lower manifold was restrictive compared to Perfomer ???
I wouldn't change from a good relativley heavy breathing n/a manifold . It seems boxed is a cheap alternative or fitted / fabricated due to clearance issues....
1991 XR8 Australian Falcon TFS induction
2014 Falcon GTE Supercharged Coyote
85 Lb inj Custom cam ,P 2000 Haltech ecu...4x's 2 coil wasted spark ignition.Twin SC 61-2s with Dart block, 330/4340 Crank, Oliver rods,7.9/ comp c C.P pistons.. 482 rwkw/ 646 rwhp..A.P 4 pot brakes...TKO