74 Duster (318 CI) to 440

I agree. Keep it a small block and keep the a/c.
If mine hadn't already been swapped when I bought it , I doubt I would be putting a big block in it.
I really consider it , because of the AC, PS etc.
I will try to fire up the 318 as is... it hasn't run in many years. If it runs good...I consider to pull it. Slap a cam , intake and speedmaster heads on it...
+ reseal , rings etc..( rockauto.com)

I was even thinking To single turbo.it but it seems very tight. From what I see and alot of re-engineering...