So here we start....150$ 318 LA short block

273 rockers and a solid cam is my only way? Never had a solid engine before....maintenance and all , always had the roller engines ( carburated magnums )

No. Not the only way, but probably the easiest. No maintenance as long as you prepare the rockers right. I don't know why the first thing people throw up is maintenance when someone brings up solid cams. You can probably go five years with no valve adjustments if you prepare the rockers right. Besides, to get the most out of an HP hydraulic grind, you need adjustable rockers anyway.