An update, Gabe?
Quite honestly, after thinking about it more, before doing any electrical/fuel checks, or spend money replacing electrical components - check your compression. It's by far the most likely culprit. Pushrods incorrectly adjusted, or rocker arms hitting your rocker box covers....something simple like that. It's a five minute check - and it's free.
Your problem could be a component issue, but since you've had everything apart and back together mechanically with so many new components, it seems more likely that lack of compression is where your problem lies...
Let us know...