does anybody know if the 13b throttle body will bolt up to the 12a intake manifold

 

No it doesn't. The 13b tb bolts to a Dynamic Effect Intake chamber which bolts to the upper intake manifold which bolts to the lower intake manifold. It's a completely different type of system.

 

is the bolt pattern different on the lower intake manifold

 

intake openings are a differnt size. they have mega squirt kits for 12A's I think it would work better than modding a 13b intake to fit and work right.

 

do u know who make the mega squirt kits

 

mega squirt is a complete custom ecu each individual does for each application, there is not a bolt in and go kit.
there is ten years of knowledge/testing/tuning/research on their forum

google is your friend on this one

 

I could swear I found a place that sold a megasquirt setup for the 12A. I mean all the parts not just an ecu. I may be wrong though.

 

Check e-bay. I saw something on there a while back.