1970 Dodge Dart 318 upgrades

Here is your best bet with a low budget 318, with a top end rebuild. I doubt ANYONE will disagree.

1. Assuming bottom end is tight, perhaps with a little smoke and decent cyl pressures of over 145-150, leave it alone
2. Thin head gaskets
3. Machine heads - Bowl port and valve job, and max decking
4. Plenty of used Al and CI 4-bbl intakes for cheap
5. Cheap small carb, 600-650
6. Dodge dakota CI exh manifolds into dual exh
7. Assess Dyn CR, which should be around 8:1, and match the right cam
8. Enjoy