i believe there are many diffrent version on the std. i have one it has a d15b2. its a 4 speed and it has the front sway bar. mine has both mirrors and a shifter console. some STD had an 8valve head like the EG's cx or the HF crx. but 91 and maybe 90 had the d15b2 with a 16 valve head. mpfi is an easy swap if you have some electrical skill. after buying my car and it had already been converted to MPFI we used my car as a guide to doing my friends crx it went 18.6 in the 1/4 mile and now he is capale of mid to low 16's his first time down the track after the swap was a 16.7 and he didnt launch very good and bogged down (basically im saying if you can find the parts cheap do it. well worth the time) it only took us about 2 hours