Actually the carb is the old Holley 0-80454 600cfm, and was rebuilt once. The other issue was I stored the vehicle with Cam2 and a mix of unleaded gas (with ethenol) and just sat thru the winter months. Even on a rebuild I guess you can't repair the damage ethenol does to rubber. I will check cap, rotor and plugs before I order up a new carb. Thanks.