bolts

Hey guys, I am going to rebuild my YJ a little. Getting UNC and UNF bolts here in europe is hard, but somtimes even in the us. So I am locking for hex flange bolts grade 8 zinc plated 1/2-13x4. The only store i can find is this one...

1990 Wrangler, 4.2 6 cylinder, EFI Fuel Injection For several years, especially in temps below 30°F, after running awhile at cruising speed, a loud whistle would come from the engine compartment when I removed my foot from the gas pedal (throttle plate full closed). The whistle wouldn't last...