has any one thought of or tried doing an rx-7 twin turbo motor in their car? it is a tiny motor

I'm wanting to just replace the factory spkrs in the front door and the rear. I took the carpeted side panels off the back to get to the rears. There isn't any clearance to unscrew the rear spkrs. Do you have to take that black metal bracket that the speakers are attached to, to remove the spkrs? Also, how hard is the door panels to remove and reinstall for the fronts to replace those spkrs?

Looking for fairly priced pistons that are .030 oversized. I was going with topline, but they only make .020 n .040 over. I know theres sealed power available and maybe clevites, but Im trying to not go with the local vendors here that have recently attempted to rip me off. I need these asap. Please pm me with price. I dont have much money as I just started my job this week... Any generous offers or references would be greatly appreciated. TY

Looking for the METAL HEADLIGHT HOUSINGS that the headlights slide into and then secured with the thin metal trim. Please respond. thanks