300 ford cam timing gear has spun cam not siezed. Tried to pull off gear it broke out around puller. How do I get it off now Do I have piston slap?

Usually you will have to remove the camshaft. This is a faily big job since you have to slide the cam out of the engine through where the radiator and grille usually are. So, start by disconnecting the neg. battery cable and the above two items. You may have to remove some fuel lines and linkage to get the valve cover off, depending on the year. Set the engine to TDC #1 (using the mark on the harmonic balancer and turn the motor with a wrench or have a friend bump with starter until pressure is felt in #1 with your finger, spark plug removed). Don't try to use the position of the rotor because it won't be in the right place, distributor runs off the camshaft and it is no longer in proper time. With valve cover removed, loosen all rocker arms enough to get the pushrods out from under them, keeping them in order. Remove the lifter valley cover and pull out the lifters, keeping them in order (a couple egg crates work nice). Now, since you have removed the grille and radiator, the harmonic balancer will be easier to get to. Use a proper puller, this one won't break like your fiber gear did. Now remove the timing cover and carefully slide out the cam. Using a bearing separator or the like, remove what's left of the cam gear and press on new. Steel gears are long lasting but some folks find them too noisy. Reverse for assembly, use assembly lube on all moving parts, look on the internet for valve setting procedure, this will be made easier since we are already on TDC #1!