for a pump gas engine you want to be below 11:1 but with quench so you want to piston to be .040-.080 from the head with a stroker you will need a dish piston to do this , it has to have the flat top on the quench side but a relief under the combustion chamber to lower compression or you will be over 11:1
the cam is the most important part of the build , you want the rpm powerband to match intake , head flow , converter & gearing so everything is working together , for example you do not want to be below the powerband driving down the highway @ 70 MPH or the engine will not run efficiently sdo if you are using an OD trans the rpm range has to be lower , smae witht eh converter , if you run a high stall speed but run at lower rpm on the highway the converter will not lock & you lose milage & make extra heat .
You also need to figure out what cam you want to use , hyd has limitation for ramp sped & spring pressure as the lifter will collapse , the solid seem to work best but require adjustment , rollers double the cost & require special parts to use .