Stop in for a cup of coffee

Karl, you being the small block guru on here. I'm building a 273 and want it to rev to at least 7k. I've been told stock rods and Egge domed pistons will do that just fine but I've bought ARP rod bolts.
I'll be using the stock 273 rocker assembly and the stock solid flat tappet lifters. I've already ordered a Cloyes Street Billet timing kit from Rock Auto.
I'm aiming for 10:1 or 10.5:1 compression in either the stock 273 heads or a set of cut 360 heads.
I'm looking for a cam with at least a 250 degree duration @0.050" and close to 0.600" lift. Maybe this one (Hughes 250/254, 108 lobe sep. 500/600 lift)or this one (Hughes 254/260 108 lobe sep. 600/615 lift).
The recommended Hughes springs are 1.800" installed height and require a 0.100" offset retainer. Stock installed height is closer to 1.6", right?
The Hughes package comes to $419 which isn't really the cheapest combo out there.
Do you have a tip where I should look for a springs, cam and retainers combo?
Like I said, I dont need lifters and a timing set so a complete kit wouldn't be economical.