where do i look to fond out what nomeclature my prom is, havent even got under the dash yet and just wanted to know first. also, is my prom interchangable with one from say a 87 c1500 pickup, so i could run a 350 with my setup(305 tbi cant handle a 350s fuel requirements) or would i have to burn a new prom, and if i did could i use the c1500 specs with my ecm? sorry for all the questions, im just beggining to look into this whole efi thing

 

oh, my car is an 89 rallysport with the tbi 305, if that helps

 

Look here http://www.cruzers.com/~ludis/ or here https://www.thirdgen.org/newdesign/faq/thirdgen.shtml