HOW MUCH LIFT CAN I RUN IN MY 5.0L FORD? HOW MUCH CAM WILL FIT IN MY 302 FORD? HOW DO I MEASURE PISTON-TO-VALVE CLEARANCE? CAN I RUN A CAM BIGGER THAN THE 274 XTREME ENERGY COMP CAM? DO I NEED SPECIAL TOOLS TO MEASURE P-V CLEARANCE? CHECK OUT THIS VIDEO WHERE I DEMONSTRATED HOW TO MEASURE THE PISTON TO VALCE CLEARANCE ON AN ORIGINAL 1990 5.0L FORD 302. I MEASURED THE P-V ON THE STOCK CAM THEN AGAIN WITH A XE274HR CAM. HOW MUCH DID IT CHANGE AND CAN I GO EVEN BIGGER?