Custom grind camshaft for nearly stock 350

[Cgoldhill]

looking to get the most out of my 350 and cant find anything off the shelf that im excited about so Im goin custom grind.
72 c10, 2wd original 350 with less than a 100k on it. 3:08 posi with a 4 on floor, open air element, warmed over qjet and a dual exhaust. Compression should be right around 8.5:1. Im keeping stock ramhorn manifolds and stock valve springs. Redline is 5000. 295/50/15 on the back for a 26ish inch tall tire.
Looking at .450 inches int/exh with a split duration favoring the exhaust on 108 lsa.

My question is, whats the max exhaust duration recommended at .050 inch of lift for my setup? 215-218? Dont care about advertised duration. My intake will be 8-10* less duration than exhaust. Truck maybe taken to the track a few times a year for fun, otherwise its just my low and hopefully quicker, cruisin C10. Real world experience with a cam close to these specs would be appreciated.

Basically i want an Isky 264 megacam with a split duration and just cant seem to find anything.
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