'84 K10 Engine Build Questions

[Marshy]

Hi guys, long time lurker here.
Sorry in advance if this gets long winded, I'll try to stick to the details but have a lot of questions...

Background:
I had a slight head gasket leak right before winter last year so I decided to take the heads off and have them looked over perfessionally to check crackes and make sure the seats, guides and valves are good. (The one head I took off only had 4 valve stem seals remaining!) The motor never overheated and gasket failure looks like it might be age related. Failure lookes like it was driver side cylinder closest to the firewall...

While I have heads off I decided I want to change the cam. Right now the heads are off and the block is still in the truck but that might change as I think it would be less work to pull the block to change the cam than remove radiators etc...

Intended Use:
I use the truck for moving loads of firewood and will eventually get a trailer to help move larger amounts of firewood. Low end torque/power is important to me however I do sometime take a road trip with it and need to cruse 60-65.

Truck/Engine Specs:
GM 350 4 bolt main, bored 0.030" over
Pistons are dished, I tried to use my caliper and measure the dish but it was crude, I estimate the dish is 0.070-0.075"
Im unsure deck clearnance at TDC and what my gasket thickness will be, I bought a fel-pro gasket set from autozone months ago...
Heads: GM 305 cast #416, stock combustion chamber size I read is 59cc and intake volume is somewhere around 169cc
Valves are I:1.84" E:1.50"
Trans is a manual SM465, rear end is 3.42 gears and I have 31" tires.

I plan on picking up an aluminum Edelbrock Performer dual plane intake and some long tube headers.
If my machinist has to do anything more than lap the valves I might consider putting in larger intake valves pending cost. Other wise the valves and heads will remain stock minus the skim cut.

Im trying to do this on a budget so would like to say with mechanical flat tappet lifters and stamped rockers that are in it now. However I am considering replacing the valve springs, push rods and timing chain as a precaution... All that said, what would be a good cam for this application?