Worth the effort?

Starter is on the driver side on my jeep 5.9l

hp per cid and rpm
1 hp per cid is kind of the middle ground of performance engines compromise between mild to wild something like a 224 cam airgap 650/750 carb 9:1 cr and headers with a powerband 1000-5000 rpm and a 5500 rpm ish redline with mild stall and 3.23-3.91 gears. Under that more like a truck powerband stock gear and stall and over that goes towards streetstrip to full race engines. eg. 1.25 hp per cid is a healthy street strip type engine with aftermarket heads 235-245 cam airgap/single plane intake 750 plus carb 10-11:1 cr 3000-4500 stall 4.10-4.56 gears etc.. 2500-6000 rpm powerband 6500-7000 ish redline.

Heads are gonna be the main deciding factor of how much power you can make.
Well we'll see how the stock heads look, I have no idea what kind of heads are available here in Sweden apart from aftermarket alu heads from trickflow and edelbrock, but there is much work to get done before the build part takes place :).