The biggest problem you're gonna run into is limiting the amount of mechanical advance. There's no easy way to do that, unless your Mopar distributor is after about 2004 and made by Mallory. If you set the initial where it needs to be, you'll end up with too much total. Conversely, if you get the total right, you'll not have enough initial advance. The only way to do it with the distributor you have is to remove and disassemble the distributor and shorten one of the advance slots by welding it up. Welding up about 1/3 of the slot usually gets it perfect. If you have the later Mallory made distributor, it's much easier as you can get the Mallory plastic advance keys and adjust it that way, without removing the distributor.....but it's easier if you do.