How would you rebuild this 318?

Exactly. Whatever you THINK the budget is.......add more for life and reality. How much more? I don't wanna say and then get bludgeoned over it but with supply chain issues- machine shop extended times and everything else in 2024 things tend to be much more $$ than planned.
You got that right. Kinda like when you sit down and design a size of a shop. When you get done, double it. lol