Wtb/tf:valve covers,intake

The MoPars engines book and a how to rebuild/how to hot rod your S/B MoPar engine are excellent places to start. Stick around and ask questions.

For your 360, intake wise, look for a dual plane intake. Performance wise going up the ladder, it would look like;

OE stock 4bbl Square or spreadbore design
Edelbrock LD-340/Weiand Action plus
Edelbrock RPM/Weiand stealth
Edelbrock Air-Gap