340 to 416 stroker build need advice

Hi, first time poster here. I would just like to get some advice on my 340 to 416 stroker build for my 1969 dart swinger 4 speed. If anyone has any personal experience with any of the parts, manufacturers, or distributors I like to hear about it. Here are my major concerns. I'm trying to make the most power I can on 91 octane. I've been reading and researching a lot online to find some proven combos, so here's what I'm looking at doing.

340 stock standard bore block
Hughes main stud girdle kit
4" stroker cast or steel crank
H or I beam steel rods
forged pistons
Edelbrock Hughes engines heads or their Iron Ram heads
Edelbrock RPM Air Gap intake
Hughes cam either hydraulic or solid in the 250 to 260 degree duration range at .50" lift.
825cfm Mighty Demon carb
MSD dist and 6AL ignition box

Those are the basics. I have so many questions but I'll try to keep it to a minimum. Here goes:
1. 4" Scat cast or steel crank? Hughes says Scat cast is good to 600hp, so I should be fine.
2. H beam or I beam rods? I hear I beams are only good to 500hp.
3. Edelbrock Hughes prepped heads or their Iron Ram ported heads? I always thought aluminum was better for trying to squeeze the most power out on pump gas, but a fella Dave at Hughes told me the Iron Rams are just as good fully ported for the same money. My concern is on comp ratio. If I went iron, my best comp ratio on pump gas would be around 9.5 to 1, and 10.5 to 1 on alum right? Please feel free to correct me. And more compression means more power right?
4. Big hydraulic cam or big solid cam? Dave at hughes said solid because I told him that this car will be driven only about 1000-2000 miles a year.

Well, that seems about enough for now. Any advice? thanks