im getting ready to drop in my new cam onto my new completly rebuilt head. ive been reading around tring to learn every trick and tip about instaling the cam, and the head. i just finished reading something about valve timing, and it blew my mind. somthing about shaving the head so much and installing the crank gear on the ''a'' postion...or somthing like that. do i have to worry about valve timing when i install my cam and head, or should i just forget about it, drop it all in following the manuals and all the other instructions ive been reading, set the timing, and degree the cam?? i want everything to be just right and run good. anybody have any opinions on this?? thanks.