i would love to see a 13b in a protege..its always been a dream to me. and it would def. fit in with plenty of room to spare. the rotary is a really small engine(1.3L). i own a 90 rx7 and honestly my protege's motor is larger. i honestly dont think it would be as difficult as we think. it would have to be converted to rear wheel drive. all you'd really have to do is customize the motor mounts and a fc rear end into the protege and buy a cuztomized driveshaft. ive seen places online that make custom driveshafts for your measurements. get a bigger fuel pump, then get haltech to power the motor. and theres different 13b's out there. 13b, 13b re, and 13b rew. a 1991 turbo 2 fc pushes 200hp stock, 13b re twin turbo(found in the eunos cosmo) pushes 230hp stock, and the 13b rew twin turbo(found in the 93-95 FD's) pushes 255hp stock. not to mention all the potential these motors have. the only prob. is you'll neva pass emisson's, and the motor is very unreliable. i would RELLY love to see a 20b in a msp. 3 rotor twin turbo, 300hp stock. WOOT WOOT. if i win the lottery, imma do this swap.