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8 V8 1970 - 1971 Mercury Cyclone 429/7 V8 1966 - 1970 Mercury Cyclone 390/6
Inverted flare female inlet thread size 5/8-18
"Holley's new LS engine swap mount plates made the EcoNova's E-Rod LS3 swap simple and painless as well as improving our weight distribution with ideal engine set-back
Brand Interchange Part Number Hyundai 28510-3C750 Hyundai 285103C750 Hyundai 28510-3C750 Hyundai 285103C750
Single 2-1/2" Center Inlet
Mr. Gasket High Performance / High Flow Thermostat - 180 Degree - 4367 downpipe-back-exhaust 8 V8 1970 - 1971Overview: Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper brass construction to further resist corrosion. Mr. Gasket High Performance High Flow
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