Amc 304 360 390 401 1968-79 Chrome Steel Valve Covers - 3 1/8" Tall w/o Hole Speedmaster aluminum crankshaft pulleys are

Speedmaster aluminum crankshaft pulleys are manufactured from 356 aluminum that is heat-treated to T-6 specs

not from sand molds

Speedmaster has designed these main cap girdles to reinforce the alignment of the main caps in high performance applications and counter the limited webbing and weaknesses of those stock blocks

but not included

and large HEIs or DuraSparks

Amc 304 360 390 401 1968-79 Chrome Steel Valve Covers - 3 1/8" Tall w/o Hole Speedmaster aluminum crankshaft pulleys areDress up your engine compartment without breaking the bank. These Speedmaster valve covers are an affordable and easy way to brighten up your engine.