Thread: removing noisy gears suggestions on chain driven set up?

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descriptions by various vendors are at the best sporatic-----------but the description that says for non-roller cams may be slanted to fact that later model roller lifter equipped engine have a smaller nose and are equipped with a thrust plate to retain the cam in its position-we used to used a front button shimmed for clearance against the front cover---now the cam may have a smaller outside diameter/bolt pattern for the gear-so its an issue of the top gear fitting the nose of the cam-----

I couldn't tell you if it had a rolling can in it or not the motor is from a 70-73 camero thanks for the help so far.

Originally Posted by joeych2739

I couldn't tell you if it had a rolling can in it or not the motor is from a 70-73 camero thanks for the help so far.

Don't take it as gospel, but on one of the Chevy forums it said,

There are two different bolt circles for the timing gear - 55-95 flat tappet cams used a wider pattern than the 87-99 roller cams.

Since yours is from 70-73 it's a Gen I flat tappet engine, unless it got an upgrade at some point along the way. You could go ahead and get into the dis-assembly and measure, then call Summit to order the gear set. Another post on the Chevy forum said that the early cams were 1.235" bolt circle. Again, just passing on what I read, so check it out before buying parts.