Peterson Fluid Systems Fuel Shut Off Valve -6 AN Male to -6 AN Male - Black Altronics they also have to keep

they also have to keep the plug wires far enough apart to prevent inductive crossfire and actual spark loss

1970-1979 GMC Jimmy

Holley 2-Barrel to Spread Bore

1980-1983 Lincoln Mark VI

Peterson Fluid Systems Fuel Shut Off Valve -6 AN Male to -6 AN Male - Black Altronics they also have to keepPeterson Fluid Systems has produced the best shutoff valve in the racing industry. Produced from aircraft quality aluminum, these valves utilize hardcoated aluminum balls and bodies along with Teflon(R) seals. Available in several combinations, these valves make fuel and oil shut off easy. Peterson Fluid Systems is the choice of champions for wet and dry sump oiling systems. Peterson Fluid Systems offers a complete system from their class leading oil