Been doing a lot of work on the k5 over the past few days.
Got the timing all sorted out which made a massive difference. There was absolutely no timing advance. The vacuum can was shot and the weights had no bushings and were locked into place. The springs were also busted.
I replaced all that stuff. And got a curve kit to dial everything in.
When I did that I put a new msd cap, rotor and wires.
The truck is running absolutely awesome at the moment.
I added a tach and just got an oldschool grant wheel for it.