I love roller cams! You wanna go solid or hyd (I have a hyd roller in my 340)? Just both check the gear on the cam and get the correct intermiate shaft gear as well. Do know that you'll have to open up the pushrod holes to make it work.
Not necessarily, my 410 has a small solid roller (248/254 @0.05, .576/.582 lift) that didn't need any clearancing in the push-rod area.
What is the intended use of the car (race, street, street/strip)?
What rockers are you using?
Are you keeping that 3500 stall converter (I hope not)?
Gears?
Weight?
Just FYI, you will need about 1200 bucks to make the swap (assuming your rockers are up to snuff)....but closer to 2 grand if you get a good converter too.