...you can use a flat tappet cam in either an LA or magnum block. People are piping up to help you. You originally wanted to build a 318...you then said you can get a good deal on a stroker crank...now you're looking at the potential of running a 360 block. It's like a "choose your own adventure" book...every change you make will have different outcomes and requirements...318 stroker crank won't fit a 360 block due to main bearing diameter differences.