[quote author=c2computer link=board=5;threadid=9979;start=0#71989 date=1034110821]<br>What do you guys suggest for a 302, MSD billet distributor (no box), and a Quadra Jet? I am at 10 BTDC now. Thanks.<br><br>I know I can limit the MSD with the springs, how do measure though at that high of RPM? <br>[/quote]<br><br>10 is probably OK, but you could probably go with a little more. The advance springs on the MSD should be fully engaged by about 3000 RPM's, so here is the procedure to check it.<br><br>Get yourself a timing light that has an adjustable wheel. I have a sears craftsman that has served me well and can be bought for $60-70 or borrow one. Hook up the timing light, stand to the side of the bronco (if it pops out of gear, EB bumpers leave nasty marks on your kneecaps when it pins you against the garage door!), have someone rev the engine up to around 3K in neutral or park and shine the timing light down on the mark. Move the knob until the harmonic balancer is reading 0 on the pointer. Look at the knob on the timing light when your done and that will tell you your total advance. Opinions vary on what is acceptable and the standard I have heard is 30-35 degrees total advance max. Of course, if the motor pings, you will want to back off the timing. Good luck.