im currently in the process of installing a tbi off of a 93 c1500 on my 72 k5, have been reading on here and a few other sites and the wealth of knowledge on here is amazing. But I do still have a few questions. I'm using 7427 ECM. With harness from donor truck.
1 am I able to do without the Drac & wire Vss straight to ecm?
2 I am using cable drive speedo, what Vss from jtr would work for my application?
3 just outside of firewall there is a grey box with what looks like a circuit board inside of it, what the hell does that go to? I can find it in any schematics.
i would post a pic but not quite sure how to do it from phone.
thanks
Frank