I am wishing I went the other way I bought a Sniper and MSD distributor with adjustable rotor also running six AL box and MSD coil. Hooked it up without timing control per instructions ran pretty good but couldn't control the idol called Holly they sent me a IAC valve. While I was waiting for that I converted over to timing control locked out the distributor adjusted the rotor. Now I can control the idol but it runs for a while and just shuts off it turns back on backfires through the mufflers goes for a while shut it self off over and over again Till it dies starts back up dies when i come to a stop I barely make it back home. I could start it in the garage and it idols and runs OK for a while once I start going down the road it starts barking like a bronco I've blown the exhaust seal out of my exhaust manifold from all the backfires I have called Holly at least eight times sent them pictures of my wiring sent them a video of the handheld when it happens. The TPS goes red shows -20 or -40 and the O2 sensor changes to heating when it turns itself off voltage stays steady. Then it turns itself back on and runs a little bit longer I have stomped it in between and it runs up through the gear just fine soon as I come back down to a 35 mile an hour cruise it starts shutting itself on and off