Well I'm by no means a chebbie expert, but I would think the compression ratio is a bit on the low side to get a lot of help from bolt ons. Not sure how much money you want to spend, but maybe some smaller chamber heads, along with the entire Edelbrock Performer RPM package, heads, cam, intake, and carb. Looks like you probably allready have the right carb. If you have to live with the big chamber heads, then a cam change and some headers may help.....