Sounds like some of the issues I had with my Sniper system, mine would backfire under load, tried everything to eliminate it but, I ended up ditching the the hyperspark distributor and coil and stuck the stock ignition back in and the sniper worked great then. Those components are really...
I love my Holley Sniper, however I could never get the Hyperspark distributor and matching coil unit to work without back firing so I'm running it with my old pertronix distributer and accell coil. It runs great, starts great when cold, but does suffer from hard restart if I shut it off and try...
Just dropping this info here I have American Racing Thorque Thrust 18 x10's on the rear of my 71' Dart with a stock A-body 8.75 rear end, but the car has to be mini tubbed with a spring relocation kit and the wheels need to be back spaced 6 1/2" and if you plan to run the exhaust out the rear...
A few photos for what it's worth in helping you solve your problems. I have the same 4 wheel disc brake kit on my Dart, but did not purchase brake lines from them. I made my own line from the proportioning valve to the rear of the car (I chose not to use their proportioning valve, bought a...