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Speedmaster aluminum crankshaft pulleys are manufactured from 356 aluminum that is heat-treated to T-6 specs
The quality of these throttle bodies are better than others available today
They include everything necessary to convert your existing spindle assembly to accept disc brakes
Speedmaster 4340 Billet Steel crankshafts are manufactured from high quality true billet round bar stock
Pontiac 265 350 400 455 1.52 Ratio 7/16" Aluminum Roller Rocker Arms Speedmaster aluminum crankshaft pulleys areSpeedmaster Stainless steel rollers are manufactured from heat treated stainless steel and alloy steel tip rollers. Speedmaster roller rockers are available in various ratios, so you are good to go. They feature greater strength and durability, capable of withstanding valve spring load up to 600lbs.
