timing problems
 

i'm new to all this so please bare with me. my father bought a crate motor from year one, #LHP350VH. it's a 400hp 350, vortec 2.02 head edelbrock airgap intake, with a 750 holley. cam has .520 lift, dur 218, 228 @ .050. hyperutetic pistons@
9.5:1 comp and a forged crank. he is running a stock or near stock distributor. what would be the best dist for this motor?