1990 360 Build To Replace My Slant Six In My 72 Demon

David burton said
Sorry, My whole post did not make it in the first one. I am looking for any recommendation on parts. I trying to build an everyday driver with over 300hp. The engine is rated at around 190hp stock. There is 100 different option to choose from and I would like help from people that built this motors before.
I am looking at a Camshaft Kit (Hydraulic-Great for Street Machines, largest cam for stock converter, 273-318 works best with 2000 stall. Xtreme Energy Hydraulic Flat Tappet Camshafts.
Intake Duration:268;Exhaust Duration:280;Intake Duration @ .050" Lift:224;Exhaust Duration @ .050" Lift:230) and Edelbrock 2075 single-qual intake and 4-barral 800 cfm carb. There is a lot different options and what to reach out help. Thank you

Let's look at it again:

190 is net. When you say you want 300+, that is usually gross hp. Big difference.
Your motor is a roller cam motor. Good for todays oils. You can go flat tappet, but you'll need different push rods.
Your motor has good heads.... 308 casting.
These engines run strong. I ran one still using the factory TBI, single exhaust with factory manifolds in a D150 (stock 3.21 gears) and went lower 15's. I would say with a good 4bbl and headers, you'd be pretty close to 300 hp gross. Yes, an upgraded cam will push you over the 300.
What I'd do, is put a DUAL PLANE intake on it, maybe the Eddy RPM. Put at least 700 cfm's on top (it came, I think, with a 670 cfm TBI). Put it in the car like that, with a set of headers. If you want a little more, home porting the heads and cutting them .040 will be a nice increase. that cam is a torque monster, you may like it being well-mannered and torquey for the street.