You can't use Windsor heads on a Clevland block, but you can use Clevland Heads on a Windsor block or better known as a Clevor (I think that's how you spell it) Block. Power Heads makes a kit to convert Clevland Heads so that they can be used with a Windsor Block. Go to
www.powerheads.com to check it out.
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Yours in SPEED=======
Mandy aka GTGRL00