Over the next year I plan on building a 393 Stroker, so of course I need a 351 block. Can someone like nxcoupe or 69fastback (or anyone for that matter =)) fill me in on the difference between a 69 351w and a 93+ 351w? Can both can be dropped into a fox, which is more desirable, etc.? I think I know that the 69-74 are flat tappet and 93+ are roller? Any info would be appreciated. I have a line on a '69 351w, dude wants $125 but Im sure he will take less. Thanks!