If you're going to put a small block...
might as well go with the biggest small block you can get; a 400ci Chevy.
or at least go with a strocker motor; a 383.
and if you're worried about keeping that 50/50 balance, it will get more expensive, but, you will get extra performance out of it.
option #1 get aftermarket aluminum heads.
option #2 get an all aluminum engine like the corvette... but more expensive.
I would like to see some psycho stuff a big block in the E46 lol.
Founder: 330Ci The 3 litre coupe