ok any help would be much appreciated. i started to change the cam in my car the other day and all was going good till i got to the crank gear. about a year ago i did just a double roller chain and since it was stock cam a buddy suggested that we use the 4 degree advance key way so now i have it stuck on there and none of my pullers will remove it. so my question is i have the heads off the car can i leave the crank gear installed like it is roll number 1 piston to top dead center and install the cam like it should be and not pay any attention the the timing marks on the crank gear.