need input on 318 build

i planned on balancing it, i was just wondering if it would be too far off or present issues. what i am doing for oiling mods is HV pickup, homemade baffle in stock pan (duster) and drilled all the oil passages from oil pump to main bearing to 1/2" and rounded off all the sharp egdes. What might happen with no cross over tube? i dont understand the theory behind it. my knowledge of the oiling system is very limited.

also is stock flywheel good to 7000? what harmonic dampener is good but cheap? (unlikely, i know)

thanks for responses so far