318 cam
This thread actually has the most "one step up" type recommendations, on only 2 pages!
Those other threads usually degenerate into two camps-
One camp says "leave the stock cam in, you can't do any better".
The other camp says "you MUST put in a .600 lift cam, and a high stall converter, and 4.10 gears, and ..... or it will be a dog".