bypassing ballast with stock ignition module

Muscley MOPAR said
ive got a 360 on a starting stand and about a year ago the msd 6al box quit working. so i sent it in they "fixed it" and i got it started again. now im getting it ready to be put in the car but at mid to high rpm its misses and cuts out. what im trying to do is put in a stock 5 prong ignition box in to see if my issues is my "fixed msd box" its a magnetic pickup dist and a msd Ecoil and i bypassed the ballast went right from ignition to + coil to top prong on box and i get no spark. but i do get spark when i flip the switch off on the ignition switch...and i have 12 volts on + coil side and a low voltage leaking through on the - side any thoughts

I would not bypass a ballast in a stock box. You may or may not HAVE a 5 pin box. Only way to tell is to use a multimeter on the "5th pin" and see if it's connected. Don't forget that Mopar gets the ground through the box. IT MUST be grounded.

The difference between 5 and 4 pin boxes is the dual / single ballast. A 5 pin box MUST have a dual ballast, and a 4 pin box does not matter because that pin is not used

5 pin

4pin

I went a different route. I use GM 4 pin HEI on mine, and one day I needed to fire up a junk engine. I occurred I could 'have' a complete emergency ignition "in a box." Here's what I did:

Plug in distributor and coil wire, hook green to ground and yellow to battery, and we have ignition!!! On a side note I see I didn't "follow my own advice." Pickup leads, really, should be twisted

Fired this mess up, didn't even put manifolds on it!!