I think the biggest issue is going to be the valve train. With you going turbo I'm almost thinking a hydraulic flat tappet cam would be a better way to go. Since we don't need killer lift rates with the turbo and excellent heads. we could run less spring which would add a bunch to longevity and you wouldn't have the maintenance issues of setting valve lash all the time. Probably the biggest thing is getting rid of the AL bronze distributor gear which wears out very fast and needs to be replaced every 5-10K miles. Whats your thoughts on doing that? Personally, I think you"d be more reliable with more boost to make up for the cam difference and going hydraulic flat tappet. I wouldn't do it on an NA build but the more I think about it with the turbos it would be the way to go. My cam specs that were giving to me for my street/strip car are:

Intake, 232-234* min, 238-242 max @ .050
Exhaust 234-236*min, 238-242 max @ .050



Get the valve lift in as much as possible and it still be reliable.

This is for a SB mopar 4" stroker (416) using ported W9 heads and twin turbo BW s300 66mm