How to 360?

If it runs good, DONT TOUCH IT!!! Change the pan. I'd add the MP windage tray pkg. Dont mill the heads, or do any more than stick a set of Comp 901-16 springs in it with new valve seals and replacing the exh valve rotators with std retainers. Replace the timing set with a cheapie from Summit, and buy the MP timing chain tensioner. Run the MP thin head gaskets. Install a performance hydraulic cam, I'd go the XE268 (biggest one for the valve springs) and use that LD340 intake with a 750 AVS Edelbrock. That's it. Poof. Instant 300+horsepower for less than $1000. Sell the Holley for the extra cash. Double pumpers are not needed. The next thing ro do would be the rear axle. Before a convertor or anything else. $800 is not enough to pay to have a rear built properly.