Like 1Gary, I had the Crown catalog and was chompin' at the bit to build one of these. You know how providing for the family has a way of cooling a hot desire though and I never got around to it.
I would build a low compression 350, around 8.5:1, but with a decent set of heads.
I'd want a cam with a wide LSA, maybe something like this Crane cam.....
Great for 305 HO and performance 350 trucks, good mid
and top end torque and HP, axle ratios of 3.73 or numerically higher required, auto or 5-speed manual.
Grind number 2040
Power range 1600-5400 rpm's
Part number 114132
Lifters part number 99277-16
Springs part number 99848-16
Intake/Exhaust duration @ 0.050", 210/216
Advertised duration 270/276
Lobe separation angle 114
Timing events (4), 34, 47, (11)
Valve lift 0.440"/0.454
Intake valve closes at 34 degrees ABDC @0.050" tappet lift
Dynamic compression ratio is 7.5:1 on the KB calc. Should make an easy runner that will operate on any kind of cheap fuel and make good power upstairs to 5400. I'd use a Weiand Street Warrior intake manifold. It matches the operating rpm's of the camshaft.
Holley Performance Products Street Warrior™ Intake Manifold*8120