Not to talk you out of a 4 link but if you are looking to go 9.0's or slower there may be better options to go with. Not saying a 4 link is tricky but you can get lost very easily. If you go that route keep notes.

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time