90-91 B18A vs 92-93 B18A

[88preludesi]

i have wai believe is a 92-93 block , had no dizzy , nothibg but block head oilpan and intake , how wud i confirm its b18a , all the sensors plugin to the 90-91 acept the injectors wont plugin to the 90-91 harness , and i have no 92-93 dizzy so i dont n oabout that i notices there was an extra sensor on the thermostat housing wich my freinds 92-95 delsoul has and the 90-91 harness has no plug for it , any help ???

 

[Ryma]

Isent there a stamp on the top of the pistons like pr-4 or whatever?