728 smog/ no smog heads

[Shaker455]

Newbie,
Got a question what is the difference from the 728 smog & no smog 140 heads?

How do I tell which is which & can the difference be bridged?

Thanks

[Jerry Brown]

The smog heads will have a concave look on the inside combustion area lowering the combustion ratio.
Jerry

[Jerry Brown]

Forgot to mention that information on Corvair heads and much more Corvair repair information can be had In the CORSA tech Guide vols. 1&2. You can purchase one from The CORSA website corvair.org is you are a CORSA member. Or sending a check for $45.00 made out to CORSA to Jerry Brown 4049 Liberty Church Rd. Manning SC, 29102. I can send you a CORSA Merchandise order form and you can use that to order also. I just forward the check to CORSA. Shipping is included in the price of the book.
Jerry Brown

[Shaker455]

Can you kindly post a pic of the two chambers?

[66vairguy]

See your other post - THERE WERE NO 149 SMOG HEADS - combustion chambers all the same, other differences, but chambers are all the same for 140HP heads.

[Shaker455]

Thanks for the reply's I'm going to get the engine.