BIG BLOCK marine heads for good power upgrade - $250 (South Park)

BIG BLOCK marine heads for good power upgrade 1

BIG BLOCK marine heads for good power upgrade 1 thumbnail

condition: good

make / manufacturer: Chevrolet

model name / number: Large Oval ports

delivery available

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Big block heads great for big power and great for marine use.

250 each

Model Casting #781
GM # 336781 BBC Open chambers Heads. Large Oval port, made from 1973-78 came off a 454
336781: ’73 through ’85 oval port, open chambers, 2.06- and 1.72-inch valves. Used on 454ci engines

post id: 7888305249

posted: 2025-10-13 10:40

updated: 2025-12-13 19:14

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BIG BLOCK marine heads for good power upgrade - boat parts - by...

Big block heads great for big power and great for marine use. 250 each Model Casting #781 GM # 336781 BBC Open chambers Heads. Large Oval port, made from 1973-78 came off a 454 336781: ’73 through...