What kind of 1/4 mile times are you running and what kind of mods have you done to your cars?
I have a RA20 (1971) and a RA21 (72) they both have 18RGs in them but I have only ran one of them down the 1/4. my 72 has ran a 15.5s with No traction ( 60ft 2.4s). I know it can do better then that.
Mods done to the car. 18RG ported head and intake manifold stock 40mm carbs 304/288 cams TRD hearder/extactor forged 10.5 pistons 2.5 inch exh. 5 speed trans 4.3 rear end 16s rims that are 7 wide tire is 8.5 wide.
my (71) is a turboRG I have a custom EFI manifold and a stock EFI manifold. 20R forged pistons stock cams ct26 turbo custom 3 inch exh. Ford 2.3 Turbo ECU 4 speed trans Ford 9inch rearend 4.56 gears that should run 12's