I drive a 1981 wagoneer with a newly rebuilt 258 4.2.
My new Holley sniper bbd for 258 has been up and running and not running off and on since August 2020.
Turns out the large cap GM dizzy I installed pre efi, has issues with the efi installed.
Not only that, the distributor has up down play and needs shims, so a recent mechanic said.
But I am having a new hyperspark distributor installed as I don't want to deal with running the HEI.
Down the road I can upgrade to electronic timing with the hyperspark.
Has anyone done this distributor install?