ported or full vacuum port?

[BUXMAN66]

i ran a search on the board here 'bout this subject an probably know the answer but was wanting some clarification.i have a edelbrock performance power package,cam is slightly larger in degree than a stock cam.204-214 @.050 lift .420"-.442",...... not a radical cam at all.so i was wondering if i go to the full manifold vacuum port to hook to my dist.,i wont need to go to a lighter spring in my distributer will i ? w/ this easy of a cam i wouldn't think i would need to,but......? i did notice a big difference in accelerator pedal responce and a noticable increase in rpm's.will i need to adjust my timing to compensate for full initial manifold vacuum?sorry for beating the he!! outta a dead horse(subject)! thanks for any and all replies!:p