Would a good set of headers or a fastman be a better bang for the buck, performance wise, in your opinion?

 

they work together benifiting eachother, basically allowing for better flow, so if i were u i would eventually do both, but since u only doing one now, i hear a lot of good stuff about fastman tb and i think thats ur best bet simply bolts on the top of the block, i would think its a lot better then breaking ur stock manifold seals if u dont have to yet.

 

Do the fastman first for sure.

 

Or, an alternitive oppinion...if your manifold bolts arent rusted in, do the headers first. If you wait, they may wind up rusting, and making a harder install. (i like headers personally, #1 because it adds power #2 Changes sound, #3 adds to the look of the truck)