You are really going to hate this then... That compression is to high to run on pump gas. It would be great for E-85 though. But you would have to get a compatible carbuerator and fuel pump. You would also have to make sure that your fuel lines are compatible as well. Either that or just put race gas in the thing. I'm thinking I saw in another post that your pistons are the Speed Pro hyper flat tops. If that is the case then they won't last long if you start detonating. You might be able to run a 50/50 mix of race gas and premium unleaded. That would bring you in at around a 100 octane rating. You would be able to get by with that. NO nitrous though. Those hypers will really hate that!
...maybe even a premium unleaded and E-85 50/50 mix might do.
Your motor will run fine with that compression and cam. You can get away with under camming it. It is when you stick in a big hairy bump stick with low compression that everything goes to crap.
Depening on what your valve springs are you could possibly cam it up a bit without having to change them. I can't remember the numbers of what you have but it really was a very mild cam for the rest of your build. You could call Comp Cams and see how big you can go with those valve springs. I'm betting that you can go a bit higher. I have a bigger cam than what you have in my 466. It idles at 600 RPM and there is no lope at all. You really are leaving some power on the table. I'd call CompCams and see what else can be done. I'm talking myself into it as I type this... Below are the spec's to my Lunati VooDoo cam in my 466. I'm telling you. No lope and it idles at 600 RPM. It also uses a stock stall converter and is quite happy. It is Lunati part number 61602. Below are the spec's.
•Advertised Duration (Int/Exh): 262/268
•Duration @ .050 (Int/Exh): 219/227
•Gross Valve Lift (Int/Exh): .540/.552
•Valve Lash (Int/Exh): Hyd/Hyd
•RPM Range: 1400-5800
Here is a link to my Race Truck with my other motor. This is running a stock drive shaft. You are in no way going to break your drive shaft with the motor you are putting together. This video is all motor (around 800HP). It is 1100 HP when it is on the bottle.
Good luck with the build. Don't give up. You will get there... And it will put a big smile on your face when you do!!