I looked for gt40p heads called every wrecker in manitoba. Asked ford they want about as much as aluminum heads from any other place. I also asked them if they had any D00E heads nothing anywhere.

Im not sure how ford product info works but I asked for replacement heads for a 69 to 74 windsor would they give me heads that had less performance for that.

I checked the aftermarket iron heads and the only ones that can be got arround here are roush heads that are about 800 a piece. I dont really buy things from ebay or know how or trust that it would even get here before summer is over. So im not too sure what to do.

as for the combustion chambers size i was hopeing someone here could help me out with that. The heads i have now have 69cc chambers and 178 145