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.

if going CA then dont overlook the often neglected brake/suspension/driveline upgrades! It can all add up very very quick!

if you want power id definitely say go the CA, they are getting pretty cheap now plus EFI reliability.

or you could turbo your A series they respond well to boost and T25G's are cheap, Gylezy on here makes manifolds.

Iv just bought a 1200 ute 1980 model firstly can I just say how fun are they to drive. But to my point do they come factory with disc on the front? As mine has disc. And has any one had there brakes sticking on? Iv changed master to a disc/ drum one change front pads aparantly coupe brakes. N rear shoes brakes don't stick all the time n more ideas will help.
Now to my real issue my m8 has a bog stock 1600 AUTO and it beats me :( how much power can you get out of a a12? Cheaply or is it just easier to put a ca18det in it I no it's a bit of a stuff around with tunnel n fuel n etc but yer a12 or ca?