I did a 305 TBI to 350 TPI swap in my signature. My only problem is that my speedo does not work. I had an electronic speedo with my 305 TBI so when swaping to the TPI, I thought that I would have no problems with the speedo. I got no responses in the TPI and motor swap boards, but Danno in the Electronics board has been most helpful. https://www.thirdgen.org/techbb2/sho...hreadid=104077
Anyway, I have the 1227730 computer for a speed density system and have a Ed Wright chip, The Chilton manual shows that the Electronic speedo VSS signal goes directly to the ECM on pin's B-9, B-10. Is the computer not reciving this signal? or do you think that B-9 and B-10 are turned off in the chip? Any help would be appreciated.