Again, the such modifications to the 33/sud seem to me a complete waste of time because such a conversion messes with the vehicle's balance. The biggest thing going for the sud/33 is the low mounted boxer engine hence a very low CoG. Driving a 164 in comparison is enormously top heavy and it is absolutely nothing like driving a 33 around corners. Installing a V6 or inline 4 is going to ruin that experience in the 33/sud! Yes, more power is nice, but these cars just do not need huge increases to be fun. I've said it before and I'll say it again:
Spend your money on moderate power increases/engine uprating and handling/brake upgrades. You WILL give WRX's and Skylines a run for their money
~Benjamin