The previous owner put on what I believe is an edelbrock performer intake and I dunno why but he put on a 800 cfm edelbrock carb I dunno why complete over kill. It also has stock exhaust manifolds and h pipe exhaust and flowmaster super 44s. I dunno if is has any  top end work done or bottom end done. I want to gain some top end and bottom end I guess I was told to maybe get the edelbrock performer kit and do the cam and lifters all together

I am sure that that package is quite acceptable.  Too bad, though, that you do not know about the engines innards. If the previous owner added all that oversized stuff on a stock engine, then that package should produce good results.

The while you are at it can kick in pretty hard with a cam change.  It is unlikely that the stock valve springs will work with that cam so I would plan a spring change.  To help the cam survive during break-in, which is crucial these days with modern oils, you could run the stock low-er pressure springs and then swap out with the correct springs for the cam after the break-in period.  Spring changes with the heads on the engine are not too bad with the right compressor.  Your gains will be limited by your heads and exhaust but it should run healthier.  Biggest drawback when adding to a stock unknown engine is that you often find the next weakest link.  You might also look at some of the "RV" cams that are available.  They may provide some real torque gains that you can feel without stressing the rest of the engine.

I'll do some searches for other cams and see what I can dig up.  If you are getting into the crank I think you need to take a step back and design an engine package.  I'd throw the cam in what you have, have some fun, and start building a 302 from the bottom up and right.  When you have it together you can take your new cam with some new lifters and re-use it if it matches the rest of your engine design.  That way you'll have a known engine that is built for the driving you intend to do.  The 302 gives you a few more options for stroking but a stout 302 can be a lot of fun.  If the 289 is original to the car you may not want to do something that could break it.  What is the bellhousing bolt pattern for your block?  Is it the early 289 five bolt?  That might limit your options for an engine swap as you will also have to consider a bellhousing or transmission change as well.  But, I am not sure how many Mustangs you have so perhaps the 289 car is not the 64-1/2.

True74yamaha wrote:

My 289 has edelbrock intake I'm gonna change to an edelbrock 600 carb. It has flow master super 44 mufflers. What kind of cam would be good in it

Thanks guys for the help

For a stockish (4bbl w/aluminum intake & duals)289, I have found a Comp Cams 260H to be very effective.

Tubo

I have always had good luck with Crane 260 grind, mild cam. Key/rule for fords, especially street drivers, ==SMALL CAM, BIG HEADS.   If you have aftermarket heads or a stroker, then that formula changes.