Post 11 second small block combos

Unported 70's vintage Econo W2's ,with an Edelbrock Performer RPM cam .I think its like .484 /.510 lift and 230 duration .Im not a serious racer though ,i only race a few times a year at 64 and older Nostalgia events for fun .The low buck motor has held up well ,so i have left the internals alone...

Whatheaders?
Chassis mods?
etc......