Here’s something you can chew on. Go to dynocams.com and add these parts to your cart: block, side cover, milled head for modified, crank, PTO crank bearing, mag side crank bearing, billet cam, extended lifters, dual valve spring kit with retainers, valves, valve cover, PCV valve that screws into the top oil fill plug on the side cover, billet 4.500” rod, Wiseco piston, ARC flywheel, coil, shroud, flywheel washer, starter nut, screen for shroud, head gasket, side cover gasket, valve cover gasket, PTO side seal, Mag side seal, spark plug, Tillotson carb, intake, filter adapter, air filter, header, gaskets for intake and exhaust. And don’t forget a starter so you can start it and a zip tie on the plug wire to shut it off and a quart of oil.
Now you’ve also got porting, polishing, machine work, and building/set up. And I’ve probably forgot something.