I am in the middle of a 4.3 to 5.7 swap. My truck is a 1993 k1500 work truck so no accessories of any kind and a manual transmission. At just shy of 200,000 miles the crank shaft broke so I decided it was time to put a 350 in as well as a/c and power windows, locks ETC. I bought a 1994 k1500 Silverado with everything I needed but it is an automatic transmission. So I need to use the wiring harnesses out of the donor truck but I am running into concerns about auto vs manual transmission differences. The ECMs between the two trucks are different. Has anyone done this and if so what do I need to do to make the conversion. I don't know if it is the year or the transmission that makes the difference in the ecm. I need to eliminate all automatic transmission wiring and programming then I am wondering about the crank fuse the goes to the ecm for start up. I'm hoping someone can share their knowledge so I know my options.
Thank you
Thank you