When I first started out, I worked as a petroluem distribution technician ( read: Gasboy) in a garage. My boss would let me take home all of the blown engines that the mechanics replaced! My parents were a little nervous, but i would take them apart, clean them so on and so forth. I was even able to take the heads to my high school auto shop where I was able to reface the valves and do a three angle valve job using our carbide seat grinder! All of this to eventually throw out all of the parts. God I miss those days!! Learn all you can, forums can't replace experience!