I have a 74 360 la engine .030 over, 4bbl edelbrock, headers,weiand alum. intake
J heads with 2.02 and 1.60 valves and stock cam.How much ball park Hp is is and what can I do at reasonable cost to improve it? IN 73 challenger with 727 trans.

 

its could be 15-25 more than stock hp, depending on the compression
raise the compression. a bit more cam. massage the heads.

 

The right cam can add 25-40 hp easy if not more.

I would call up comp cams or crane cams and give them the the specs on what you have. They will be able to match a cam to your motor and needs perfectly. I think it's Comp Cam that actually has an online spec sheet that you fill out and it will spit out the right cam too.