What RPM range are we talking about. My engine will be cruiser type of deal but I want what I can get out of it. If I keep RPM below 6000 to 6500 (Usually well below that) will I be OK with the rollers & a single spring with a damper? Or will a dual spring be required? Right now I don't have any of the roller related valve gear (I do have adjustable rockers) no spider, lifters, etc. I"m sure it'd be cheaper to go with a flat tappet cam, but is there a roller profile that would be advantageous for me? I'm probably going to use my 340 Hipo manifolds, so I know I'm limited in what I can expect out of the motor. Hughes told me "You can never have too much lift" so I'd think that if used a roller setup I could bring the lift on that much quicker. I'm thinking of using an 833OD trans with my 3.91 rear, so I'll probably want to try for a wide, flat torque curve because the ratios in the trans are pretty widely spread. Or, I could use my close ratio trans & swap 3rd members if I ever want to go on the highway for any distance.
For a roller, Hughes recommended either an HER 1828 AL or an HER 2228 & to close the lobe seperation angle up to 107-108, or maybe 111 to 112.
For a flat tappet cam they recommended either HEH 1928 AL or an HEH 2328 AL & to close the lobe seperation angle up to around 111.