Camshaft upgrade?

The engine will run slower unless you up the compression ratio of the pistons. FYI. It will be a waste of money, and you will be frustrated. When you try to get more power, it is a combination effort and must be done all at one time. Trust me on this, I have been down this road many times. Just leave it, put the money into a good growth stock like VOO and continue to do so each month, you will have money to retire on :) Life will be good.

I was planning on putting ported 243 heads. I also figured out it will need a 3600 or 4000 stall converter so I’m going with a chopacobra so I can save money. Do 243 heads fix the compression issue?

Do you know the combustion chamber size in CC's?

I believe it’s currently 61.15 cc with 706 heads and it will be 64.45 with 243 heads.

I’m thinking about just porting the 706 heads since 243s would lower my compression and I’m planning on keeping it NA.

Yep, lowering it would not be good, I would get the cylinder heads that raise the compression instead. More compression will help much more than porting FYI.

Yea I was wanting to learn how to port heads. Can’t go wrong with getting some junkyard heads checking their flat and porting them. Ofc I’ll follow tutorials. Should I have the head milled down if it’s not flat? That would help with compression. And should I run thinner head gaskets? I’m going to use ARP head bolts so idk what issues it could create.

Yep, that will help, porting the heads is fun so if you get the change go for it. You will need to remove the valves and have them ground while having them resurfaced. Yes, this will up the compression with a thinner head gasket should be good for you.