Inliners International Forums General Discussion Engines GMC Head for Dome Top Pistons With Flat Top Piston

Hi, thank you. The engine is buttoned up and reassembled. I can take measurements from another 477 head I have on the bench.

TDC shows the pistons approximately 1/64" .015" or less from top of block deck (estimating from photos).

Regardless, the combustion chamber is larger on the 477 head. Still trying to determine though, what if any effect there would be if the compression is just a slight drop from an 819 head. And if it is worth investing $400.00 or more into a different head and fitting valves - if the effect is really just minimal and the engine will operate fine for street use.

Appreciate your response. Will see if I can measure the difference in volume between the to heads.