hi there i did a carb swap on a tbi . i stripped down everything...computer wiring etc..it was a real mess before...now i can see clear carb is a 650 cfm edelbroke it start and idle perfectly...start even better than before before that , i did a compression test ( wet and dry )and all cylinders are good with a vacuum gauge test at idle it get 21 but the needle is not steady , it kind move vibrate slightly between 20 and 21 with the help of someome pressing gas pedal and keeping it at 3000rpm range the needle goes to 23 and vribate a little more between 22 and 23 the truck feel good around the block but when i get on freeway and or up hill . it doesnt have much power any idee? also i have a fuel pressure regulator an holley hly-12-881 with a gauge when engine cold, i start it , pressure is 6psi engine get warm and it end up just under 5psi is that normal ? should i use the vacuum port at the fuel pressure regulator?