LA vs Magnum crankshaft
Make it easier, on yourself. Give the crankshaft company ,the casting number, off of yours. That tells them, what you need. If running a stock Magnum 360 rod/piston set,I wouldn't worry about balancing in a street/slight strip application.
The inspection & installation, make it live. Check the journals for rust & dimples,crank snout for good threads(then you pay for it!). Wash the crank off, hit those crank oiling holes with a bottle brush & solvent (WD-40 works).You will find cast iron grindings in there,it's necessary. Crank end play,Plastigage rods & mains as well.
Standard Crankshaft ,does nice work . Had one N.I.B,sold it to TX Dart here. Decent piece.