I swapped a complete '89 4.3L/700R4 into my '88 waggy. It has the stock TBI with an 8062 ECM. This ECM shares the same wiring as a 7747 and I was even able to get the engine to run on a spare 7747.
Well the PO installed a Hypertech 'chip' into this ECM. The chip itself is stock in appearance. The engine has edelbrock intake/headers/cam, hence the reason for the chip.
I did some data logging with winaldl and found that the BLM's are consistently running in the 130's-140's. It rarely dips below 128.
I'd like to run a 7747 in there (mainly because I have a couple of 7747's that are already modded for sf512 and zif socket). My question is: what BIN file should I start with on the 7747?