So here's my problem, I can't get my motor over 5000rpms on the street....history is it's a 2014 Butler 461 built, broke in and dynoed by them at 472hp @ 5500rpm, it never got installed just sat wrapped up then I bought it last year and installed it this spring, specs are...9.75 comp, Butler grind cam 282/288,230/236, .510/.521 114LS, ported polished iron heads, MSD, ready to run dist.(no box)Holley 110 gph pump. I put my Edelbrock Performer RPM and Holley Street Avenger 770 vac secd, and my 8mm Taylor wires on it from my other motor a 455 that developed a rod knock. I have the original tank pickup, new 5/16 braided fuel line, in line Edelbrock 40mm screen filter removed the stone filters from the carb, new Accel can coil and a wire from the battery to a relay so there's over 14 volts to the coil now thanks to Pontiac Bobs post, I purchased a new harness not knowing about the resister wire, you think NPD and American Autowire could put in there description NOT FOR ELECTRONIC DISTRIBUTORS after four coils and calls to MSD,Butler, new battery, ground wire Bob had the answer and I thought for sure that was my rpm problem but I only got 500 more rpms more. Set the limiter twice once at 5800 then 6000, revs past 5000 in neutral but not under load and feels like something is breaking down at 5000 no surge or bucking just feels like a rev limiter, also put the rear float over the half way mark that's what Jim Butler suggested but have another call into them to say it didn't work. Sorry for being long winded just want to get everything out there, so any help would be great before all my hair is gone,thanks,Randy