need help guys just curious what would be a good plug gap on a 347 stroker? I have stock externals all except for upper and lower intake, which is cobra, and bigger mass air calibrated to 19lb injectors. please respond    

The gap on the plug depends on (Comprssion/ignition/Nitrous/Turbo/etc) If your engine is at between 8 and 10:1 compression with the factor ingnition or after market you will be safe at 45 gap. With an after market ignition like MSD coil/Distributor/box run can run this gap with even high compression. Once you start puting nitrous or boost then you start closing the gap.  

yeah i do have msd coil and 6al box with 8.8 plug wires. I know a mustang with stock 302 the gap is .54 but i figured there may be a better gap for a stroker. mine has 11:1 compression, so you think the gap should be at .45?  

I have the 89 stroker for sale along with an 83 w/308 11.5:1 and I run .35 on a 150 shot. With the MSD you should be good at .45. P.S. if you know anyone looking for a build 10 sec street car have them look at the ad just below yours.  

ok i will do that thanks for the help man.