I have a summit billit hei with there multi spark box, at around 5900-6000 rpms it has a bad miss. I have checked all plug wires, plugs and rev limiter setting. All seems fine, it starts great runs great up until the last 66 feet of the quarter then cuts out. Has this happened to anyone else? I'm sure like everything else I am moving out of the street parts into more race type parts. If I need a new set up, some recomendations would be appreciated.

 

I'd suggest trying to borrow a better module for the HEI, and see if that helps.

 

Found it!!!!!!!!!!!!!!!!! secondary fuel bowl float set a little to low. Thanks for the reply.