Try a turbo. With a bone stock 318,(deck O-ringed with copper head gaskets), blowing through the 2bbl intake,(draw through system), with a 800 Thermoquad at 26lbs. of boost, 536hp&586 ftlbs.
I have since upgraded cam, heads, intake and gone to blowthrough so it needs less boost. I am hoping to have the motor bolted to the dyno this weekend.
I dynod the 318 with the stock 2bbl at the time, just advanced the cam a bunch to try to get some cylinder pressure. It made 160 hp. 1 hour later with the turbo 536 hp. It cost me less than a grand.