MSD ingnition
 

I've still got the original stock ignition system in my 1984 mustang with a moderately modded 351. I'm running 12.80's around 106 on M/T Sportsman Pro's.

Will I see any improvement by installing an MSD 6AL or should I leave it alone if it's working.

probably not that much of an improvement, maybe like .1, cause you say you dont have too many mods right. did your engine lack power in any rpm ranges before? if so it'll really help.

Thanks.

Engine is .40 over, 10:1
Engine related mods are Windsor Jr. heads, roller rockers, Crane 284H energizer cam, Weiand stealth intake, Holley 650dp, unequal shorties, H pipe with cats.

It seems to pull fairly well with no noticible flat spots.

well those are some pretty good mods man. yeah definitely go with the box. it'll help keep full power into the higher rpm's!

Thanks for the input.