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John, In my other car I have a 440 block that I put in sixpack pistons and sixpack rods. I'm using 452 heads on this motor and I do have pinging at higher rpms. More noticable when I get on it. Would a different set of heads do better on this motor?Like 915s? I always hated hearing the pinging!!!

Going back to the 426, can you tell me what specs I would need to order custom pistons for this engine to make it right? Thanks, Alex



the 440 you can tune that out somewhat , rool back the timing some , if vac advance is connected disconnect or limitthe amount of advance , putting on the 915's would help it alot , the open part of the chambe on a 452 can be as much as .120 deep and I'll assume you are using composite gaskets .

As far as the 426 , no because I can't tell if your block is square as it is and what the ACTUAL deck height is from where I live anything would be a complete guess and that's not a good way to measure for customs .