I'm getting ready to swap out a Streetmaster intake with a DP4B dual plane on my 383. The setup is manual choke, with exhaust gasses recirculating into the engine bay thanks to a non-blocked-off crossover and the Streetmaster. In November, we are planning a trip from Atlanta to Daytona Beach for the Turkey Run.
Some questions:
1) should the valley pan be replaced when changing the intake?
2) Are gaskets required to prevent intake leaks? should I use RTV? Page 9-49 of the manual mentions the tappet chamber cover but nothing about intake manifold gaskets.
3) Is it a good idea to partially block the exhaust crossover (i.e by drilling holes in the gaskets) when using an aluminum intake?
I still have a few weeks to sort things out before the trip. Thanks.