My old 400 let loose. Picked up a 1970 400 with #13 heads. Had been rebuilt but dont have any cam specs. Pulled it apart to regasket, new melling oil pump, timing chain etc. Bearings and cylinders all looked great. CC'd the chambers and heads, pistons had small amount machined out of center. Calculated right at 9.4-1 for compression. My old 400 had a holley 600 on it. Never cared for it. Picked up a used Edelbrock 750 for 10 bucks and rebuilt it. Dont like the way it acts. Can't get the off idle stumble to go away and it idles down to about 1500 rpms then slowly idles down to 700 rpms. Have run alot of edelbrocks over the years on chevys and loved them. My question is where can i get a quadrajet that i can run out of the box for a fair price? Car is a 67 with a munci 4speed. wide ratio and tall gears. Not a race car just a nice cruiser. Motor does have a nice lope to it. Full length headers and an old edelbrock performer. HEI ignition etc. Have 2 holleys and an edelbrock. If i'm buying a new carb i want to make sure i get it right the first time. Thank you for any and all help. Also will the quadrajet bolt up to the Edelbrock intake? Have a Lokar throttle cable so that should work and a manual choke cable.