the 93 pcm will run and shift the 94 engine. you need a new prom. not a whole pcm.
and only some of the wiring would have to be changed. not all.
1 change off the top of my head would be the egr wiring. on the 93 L67 which has the 3 solenoid, digital egr. the green connector pin c9, is for the boost control solenoid.
for the 93 l27, the c9 pin was for the "a" solenoid on the egr.
i dont think there is many other differences, if any, in the wiring.
but because the 94 l27 probably has a linear egr, you would have to use the 93s digital egr, or delete the egr.
as far as the prom goes you could
1- find a prom from a junkyard,
2- have the 93 prom re programmed. i had one done for my project in my sig., by a guy at www.gmtuners.com
, named ryan. he was and is very helpful and im sure can help you on this.
-Wes, not actually sam, thats just a joke.
92 Buick P/A L67, Gen 3 swap. 2.55 pulley, FWI, PLIM
92 Olds 98. L27
97 Bonne, SE. the Daily