Cheaper than dirt 318 build

Then I'll just say find a 2nd hand dual plane intake on your local marketplace shopper.... find some 600 cfm carb that may run without a kit, and buy a set of hedman headers. Might not get 300 hp but that will about double the power of your slant six. I'll bet if you go through with this, there will be more threads to come along. Good luck! And keep us posted!