ok by surge do you mean nothing till 5k and then it would spin the wheels?

come on stu what would you do in my situatiion? fit the t34 with .63 or go for a t4?
ive never drivin either so dont know how they behave?

the spec on the engine will be, 4x4 pistons, cometic gasket, head work, lightend and balanced bottom end. running greens at the moment but looking at going blue or grey in the near future oh and probably bd10's also.