Getting good power out of an A12 is no where near the expense of a ca conversion. Im sure some of the folks on here that have done them, dont want to admit what all the reciepts add up to.

If you just want something to beat your mates 1600 auto, and is fun to drive, i would reccommend a carb/turbo setup. Cheapish and if your not aiming for HP hero, then design isnt too much of a concern.

Else a cam, ported head and carbs will give the girl some poke.