*Realistic expectations..C-mon jump in!

Ok, I have decided it is time for me to ask for some opinions. I recently purchased my fist Mopar. The 340 has a lifter knock, I will be replacing the entire valve train in the next few weeks. There are a lot choices out there and I have spent many hours pouring through the "Search" function on the site. Here is my combo,.30 over 340 stock crank and 10.25:1 cr XHeads with stainless valves and 1970 Hipo manifolds 2.50" TTi exhaust (H pipe) The car wieghs 4200bs and has stock ralley wheels with 26" tall tires. Rear end ratio is unconfirmed @ 3.23:1 possi 8.75 carrier. The 904 does'nt seem to have any stall, I will be pulling the engine this week, so a stall convertor is planed. I am looking to do a "Roller" set up, Lifters,Camshaft and Rockers. I would like to retain the manifolds and gears, what's a good grind for a roller cam? I like a weekend warrior type approch, push the limt of street use and the odd track day. The car will be used twice a week in the summer months.

Thanks.
Woodie

P.s It is a 1972 Scamp. Thx Demon seed!