Building a 383. Need alittle Advice

[OrangeAnimal]

I will start with the basics. I am using a 4 bolt main block it will be bored .060 over. I was told that the bore being that much won't matter.

I am using a Eagle Internally balanced rotating assm. 10.7 to 1 comp ratio.

I am using a set of Dart Iron Eagle heads. I know there are better ones out there but this is what I have. IIRC they are 200cc runners and have 2.02 int. and 1.60 exh. Angle plug.

I am going to use a performer eps intake and a BG Mighty Demon 750cfm carb.

Still unsure about the cam and the carb though. I don't want to get too crazy with the cam even though it's a 4 speed. Need something that can be driven and streetable.

I was thinking something like 220* duration @ .050 and about 480-500 lift.

Hoping to produce a solid 400hp.

What is the deal with a small base circle cam? I can't even find any noting that.

Thanks for the help.