My car is 94 WRX and the bottom end went last month, been offered a semi closed deck from version 7 sti. Also been offered the cams from the same car will these fit?

And if anyone running them on same or similar car get good gains?

Is this a worth while mod.

My car will be built with TD05 20G or md321 turbo and stronger gearbox.

 

The SCD block will be a straight swap. Cams maybe not. The complete STI7 heads definitely wouldn't be a swap as the inlet manifold bolt holes are in the wrong place.