So picked up a stock 1972 Chevy 350 4bolt with 1.94 heads for cheap because the guy broke a head bolt off in the block. The motor had a new oil pump and gaskets. I was able to easily extract the broken bolt. I decide to build it up a little. I had the heads milled down 20 thousandths (due to some damage). I had a family member over and he pulled one of the lifters out to check it and sure enough every one of them was cupped pretty good. So while the engine is out of the truck I'm just going to put a whole cam kit in it. I just want a cheap cam that will give me some more power. I was wondering if I need to be worried about the valves hitting the pistons with a bigger cam. I don't have the money to completely redo the heads with new valve springs and everything else. I was wondering if anybody had any suggestions for a cam I can use with all the stock head components and pushrods. I'm looking to stick with the hydraulic flat tappet. It's going in a 68 K10 with the stock 4speed. It will only see the roads with no off-roading but I would like to keep in mind it is a 4wd truck. Any input is appreciated