Hi Moparts community. I have a Magnum create engine the 402 magnum. it is advertised at 9.5/9.75 to 1, pending where you are getting the info. I would like to wake it up just a little. if i changed the head gaskets to something just a little thinner would i be able to get around 10.5 to 1. and is the work going to be worth the effort. I can't find too much on this motor as they don't make the motor any more out of the catalog. I am trying to find the thickness of the current head gasket.

the car is a streetcar just a little on the slow side for my liking. it ran 12.50 this last fall at Ubly Dragway.

I don't really want to pull the motor apart to get very little gains. It is a really nice car and cruiser.