i was planing a rebuild for my 90 and i was woundering if i were to get the gtx rebuild kit if all of the gskets and seals would be the same or would i have to get some different seals, and will the rods and pistons from the gtx work with the miata.

 

this is somewhat common knowledge, I suggest you use the search function...
oh, and this is a very nice way of me telling you, others are not so nice...
good luck

 

rods and pistons WILL work, the have very low compression IIRC 8:1, the rods are nice. just use a mazda gasket set.