Performance expectations

Hey guys I really enjoy the site and have learned a great deal in the short time I have been a member. I recently replaced the cam in my 355 and had the guides cut down on the vortec heads which are on it. I changed the cam from a 268 High Energy comp. to a 268 Extreme Energy Competion cam. I believe the specs are 224/230 and 477/480 with 110l/c. I have z28 springs and stock rail rockers. Other than the guides and springs the heads are stone stock. I have a Edelbrock Performer RPM intake with a 750 Speed Demon carb. I realize thats too big of a carb but its what I had. The bottom end has cast flat top rebuilder pistons. The rotating assembly is balanced and has a windage trey with a deep sump pan. I'm running Flowtech Afterburner headers
i believe they are 1 5/8. I have a Summit hei and Taylor wires.
The rest of the drive train consists of TH350 with 2200 stall. The rear end is a 9" slightly narrowed to allow for 295/50's with 4.11's and Trac Loc.
It has multi leaf springs moved inboard with slapper bars. Future plans call for 3.50 gears and a smaller carb. I've cosidered a Sean Murhy tweaked qjet.
I greatly appreciate any advice or suggestions as well as HP, torque, and possible quarter mile time estimates. I almost forgot to mention the car in question is a 69 Nova, all steel, and somewhere around 3650 lbs with driver. Did I mention thank you.