Hey all , heres another question , We run a locked msd dist with 30 to 34 degrees timing, we have no test and tune at the local mud pits and I cant find a long enough spot to test truck past the 1-2 shift, we installed a msd ign control but have had problems with it< seems to cut back spark from strong to fair> so we time it with a light when we make any changes and bypassed the timing unit, We mostly run @ night and mud racing and tuning between rounds is hard due to MUD so we cant make simple changes fast, It seems my 414 w5 small block will start easy as long as the timing is somewhere close 20 to 40 degrees , we have been running 33 degrees for the most part ,We mostly run 110 octane but if we will run av gas 100 LL sometimes, we are @ 12 to 1 comp and cant tell a diff between fuels , I have never seen any sings of pre Ign or det , as rpms increse over 6500 do I need more timing lead ?