if mike canter is out there i like ya to answer this please. i have an 548 ci chevy 871 high helix carbon hat 11.7 to one comp. 4.50 bore 4 1/4 crank at 28%over. on alchol . no matter what i did run timing at 28 to 33 fat lean 4.50 always !!! in 1/8 at 153.00 . msd said ign . more ign. so i bought a 10 plus !! didnt change any thing. un plug an plug in . fired it up checked timing .. went to 44 degrees w/o changin any thing. so i backed it down to 30. off the trailer went a 4.38 so my question is this ?? should i spend more money an up grade to a mag?? pro 44 or 20 ?? do you think ill gain ??? or a mallory?? what mallory is equal?? super mag 3 5 10?? thanx discodean! ps/ if i go for more boost is my ign enough???