Is it possible to get just the fuel pump with out buying the entire assembly after market or otherwise? And if so were?

Sure, pick up the Racetronix pump. http://www.thunderracing.com/catalog...vid=4&pcid=166

any stock replacements that cost less? or is that as good as it gets

There are fuel pumps that are close to a stock replacement but they don't fit well in the stock fuel bucket. I installed a Walbro 255 lph pump and it was a pain in the ***. Some people ditch the fuel bucket, but this bucket serves a purpose (you can read about it on the Racetronix site). If I had to do it over again, I would have gone the Racetronix route. The extra few dollars is worth it for the easier installation. I helped a friend install the Racetronix kit and it's a much better solution.

You don't need to spend the money for the upgraded wiring harness if you have near stock fuel demands.

What about the holleys?

I believe the Holleys are a direct replacement for the third-gens. I'm not sure how they would work on the 4ths.

This is also what I was told.

I used aBBK from summit in a 4th gen worked fine, fit in the bucket fine...its just a walbro 255 in different packaging

According to that page the racetronics system uses the Walbro 255L/Hr pump.

Oops, sorry 2000 GTP, I meant to quote OBE1 95Z28 to point out your link.

The bucket also has to be modified to fit.

Link?

It used a Walbro pump, but it is modified in such a way that it drops right into the bucket without having to modify the bucket itself.

how does the bucket have to be modified?

You need to shave the ribs on the inside of the bucket a little bit.

On mine I had to replace the O ring, since it was a tad bit too big. Not bad, an extra 30 cents from True Value.