[cob289]

What the hell do you want with the EFI on the old Rover3,5 ??? Are you keen to build your Kit ??? Usualy you first decide which engine than you decide the car.!!! We all used to go british with a Triumph TR6 or modern british or better traditional german with a BMW 5/6/7 series engines, but only straight six on the ACE !!!!********************************************** ***
I like the Rover with stage 2/3 heads on and Weber carburator and manifold good for 200 - 220 HP. With 3.9 engine you'll have 240+HP, with 4,6 and matched heads 270+HP.
For the rear axle go for the salisbury type, not the banyo ! Gearboy std. Rover SD1 is fine. Headers go for the MGB convertions from Moss , the have to be close to the block, and they are good for more than 270 HP. If you want to know more, please feel free to ask.

Fritz