MLS head gaskets for 351w

just stock.....gonna throw a stock test engine in so i dont hurt my money pit while tuning and i can do mock up and all that.
 
Slightly, but let's assume a 4.030" "stock" bore engine. A 4.180" gasket will be .150" larger diameter, or .075" per side of the bore. After gasket crush, I'd be willing to bet it measures closer to .050" per side larger. That is not much material, and will work fine for what it sounds like you are doing. I run a 4.210" gasket on a 4.185" bore just for that reason, so the gasket is not hanging into the chamber when crushed and being heated during combustion. A slightly larger bore gasket is good for keeping it tucked away from the heat, and therefore longer life(especially using spray). You may be surprised how much a MLS gasket will "squish". Just my opinion, other's will surely vary.
 
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