On my original '55 heads, ECG-D I put in the 1.92 intakes, mild cam and full rebuild, .030 over I believe, did I gain anything with the larger valves. Now my 312 is out of a '57 Ford wagon, the heads on it are ECZ-C, with no 5752 casting with Mercury valve covers, kinda figure a head swap for a valve job some time ago. Will putting the 1.92s in here do any good or just a waste of money. Just the cost of the valves, my stuff is done for free at the speed shop.

       

Gary, 55 Vicky, St. Germain, Wisconsin