Replacing a crank shaft questions

OK, so mixed use, mostly over-the-road driving. The cam size makes more sense now. It is not a big change, so not sure how much it is going to change the engine operation.

Very rough numbers: Dynamic CR work out to 7.75 with nominal numbers, the 3.58" stoke and flat-top pistons, and a guess that the heads are close to stock chamber size; pretty decent for keeping low RPM torque up.

Go to a 4" stroke, with flat tops, and both CR numbers jump up a about .8 points so needs some work to keep the DCR numbers from getting too high... a step bigger cam, knowing the chamber sizes within a 1 cc accuracy, thicker head gasket, all can be used, but once you push things up that far, it's really necessary to know the exact numbers on everything to work it to a reliable number.