Help with sb combo

I am thinking that you want a big cam , but don't really have parts to support it.
The heads are strike one.
The carb is too small for making big power at big rpm.
The pistons and rods will work , but you will be working them as hard as they want to be worked.........I like to have a bit of a margin or over build for reliability's sake.
Something in the .550 lift and 240ish @.050 will be a lot easier on parts and need less expensive parts like valve springs and pushrods to keep happy.
And should give you plenty of power to churn out low 7's in the 1/8th.
The more radical the valve train , the more you want better components involved.
This way , you are building more of a motor and less of a grenade.
If it were me and I was doing a similar build , I'd focus on something that will make laps and not give me headaches......in the head or the wallet.
As noted above , you can do what you want on pump gas if you have well matched parts.