Re: double hump heads on a 78 engine
Be careful here...the '461's did not have the front accessory mount taps so you will need a '60's style alternator mount bracket that goes off the water pump, intake, etc. Trucks and cars since 1970 almost all used the accessory mount taps for various brackets.
They are a good head and will add some power and compression to your engine.
My two bits.
Coley
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1966 Chevy 1/2 ton (Florida- Red/white)
1972 Chevy 1/2 ton (California- Blue/white)
2005 Chevy Silverado HD2500/Duramax
2000 Dodge Ram 1500
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