1993 Chevy Cheyenne project truck

Well the only way to fix this is to go old school with an old style HEI distibutor and carburation. See the computer no longer has a knock sensor to read as there is no place to put it on the older pre injection blocks, so the timing is retarding it or advancing it and so on so the timing is alway way off. So it is either get the proper block to hook up the sensors that need to be there for the computer or eliminate the computer and carb it.