1988 Ford F-150 Truck Acts Funny

I have 1 1988 F-150, 351 Windsor, 2 wheel drive. This problem started a few months ago, and now it does it all the time. When you start it up, acts like it is getting no fuel, feels like it is only running on 3 cylinders instead of 8. If you baby the throttle you can get going. When you put it in neutral goes away, bring back into drive, shakes. Eventually you get going and then runs fine. Sometimes at a signal it acts up, but then goes away. I recently put a map sensor in, but that did nothing. I don't want to be replacing everything, hoping that what ever I put in will fix this. Any help would greatly be appreciated.



Optional Information:
Year : 1988
Make : Ford
Model: F-150
Engine: 351 Windsor V-8

Already Tried:
Installed new map sensor