wow bitflipper your one smart sob...lol. that stuff looks like Japanese to me...lol but I wondered about that.. I didn't think the 02 heating up any faster would make any difference in an old system like this since the choke controls most of the mixture till it gets warmed up the o2 sensor really wouldn't be needed till its warmed up. also I was wondering if our old ecm's would calibrated the same as the newer fuel injected stuff that the heated ones come from. and I did take the dash apart and I do have a vss in place. haven't had a chance to check the outputs at the buffer yet. got lots of wiring to straighten out..lol its got 30 years of back yard wiring. I work as a mechanic for a Chevrolet dealership so at least I have access to all the shop manuals and wiring diagrams...