what about boring over by .2 or .4 with the 3" exhaust and cold air intake?

Do the math and figure out the change in displacement and that should point you in the right direction.

im really bad a math... and i wouldnt even know ware to start lol...

regardless what you do with your NA (unless you make it into a 7MGE-t (thats a turbo addon to a non turbo 7M which I would not recommend) your not going to notice any massive pull increase. Dollar for dollar your better just dropping in a 7mGTE or doing a 1JZ swap.

I have done a ton of reading in this and the 1JZ is the best overall, however the 7MGTE is acceptable as well (and cheaper).

Unless you are going to put it on a track though, you dont need to do massive upgrades. Personally, if I owned a NA, I would do what I could to get it running solid and at peak efficiency, I wouldnt mod the hell out of it. Its not worth it in my mind. Large overbore = large $$ considering you would probably be thinking cams/pistons, etc.. going to cost you more than actually turbo'ing it.

hmmm the a normal rebuild and just add cams, cold air intake and a new exhaust cause the car needs one anyway. then do body work and if i cant find the 1990 supra im looking for ill go GTE and have fun moding the car for stick. thanks for the info. im just trying to get as much as i can out of the GE was all i was looking for.

I dont own a NA, so I am typing solely out of research, not personal knowledge. (just so we are clear about that, lol)

Just build the 7mge to take a huge turbo Or a shot of nos

thats a nice way to blow the engine or was the the point?

No u will wont blew it if it's build up withe forged parts and arp bolts the stock crank is already forged but I don't know how much hp it can hold safely