318 pulley mistake, need the correct size.

[Ant]

That’s just not true. And it causes people to have cooling issues when they shouldn’t.

Lol. That reminds me of the 5.0 mustang guys that make their cars terrible to deal with at idle and low speed driving because they installed an underdrive pulley kit. I don't know how much power underdrive pulleys free up, but to me it's not worth it for a street car.

 

[toolmanmike]

Here's a great thread about small block pulley diameters.

Pulley Diameters

I've been chasing a running hot problem (210*) for quite a while on my 340 w/ aftermarket AC. The car has billet aluminum pulleys right now that are both 6 1/2" diameter. I believe the crank pulley should be larger than the water pump pulley. What should the pulley diameters be on a small...

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