knock sensors on LT1 ?

[skandolis]

Hey guys, just came into a 95 "bubble" caprice for a swap project. the original engine was a l99 (4.3) at some point it had an aluminum head lt1 swapped in
(then abandoned forever, looks like its been sitting a number of years.) anyways after a lot of cussing and alcohol it fired up today.(and ran badly) the only code was for knock sensor circuit, so i crawled under and yup two plugs for knock sensors and only one sensor. i assume the motor is from a F body and only ran one sensor, but the question is how can i make it happy with the one that is on it? Looking at the bin in Tunerpro, I can't find a flag or anything to indicate a difference. google seems to be no help except to tell me what i already know, The F body had one sensor and the B body had two....... is this just programming or do i need to pony up and get a pair of sensors? any help appreciated, thanks much.