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Hello what is the difference between ECG -6564-A2 and ECG-6564-B2 what the difference between A2 an B2 thanks
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The A2 uses the lock nut, the B2 is the interference (adjuster, not the rocker) fit. Same ratio on both The rockers are a little different where the adjuster screw in (thinner on the B2). You can use the interference fit adjuster on the A2, but it's tight as far as adjustment goes.
54 Victoria 312; 48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ
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Thank you.
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Further to what Paul 2748 says, both rockers are 1.54/1 ratio, but the thread on the one piece adjuster is an interference fit & while you can try to use them on the earlier A-2 rockers, it's a very tight fit, even when oiled.. I tried them in a vice, but felt it was too tight to be practicle to install on an engine....
Paul
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