Quote Originally Posted by AKEP View Post
i'd toss the a4 head on the a3 and rebuild the bottom end with oem. a cylinder hone is cheap and so are rings and bearings. would net you a lot of experience and satisfaction with a rebuild. then i'd take the block and get the a1 rods and pistons, or some forged pieces and put it together for later. slap an a2 head on it and kpro. done. 2 builds in one.
Can't use an a4 head on a k20 due to the a4's dome shaped pistons if it were an a1 this idea would be solid