If you EVER plan on building it bigger than a 572 you better at least get it clearances now. I didn't and am limited on my Keith Black engine. I don't ever plan on going bigger so I went the route I did.

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