what kind of relabilty do the holley blue pumps have ? going to run electrics , looking for best bang for buck.

What motors? I would run the holley blacks if I were you. Gives you some leeway if you ever bump the power up.

about 625 - 650 hp 540s

I haven't had a ton of luck from the Holley pumps. I use a pump from Aeromotive called a Street Rod pump. It runs a little more than the Holley, but is well worth it. It's around $175-180. I have been using them for years and haven't had any fail yet.

Here is a link to it at Summit so you can see what it looks like.
http://www.summitracing.com/parts/AEI-11203/

Eddie

what regulator do you recomend ?

2 black holleys new 300.00

Aeromotive , only way to go!! Holley's all i read is failures.

I have used both the Holley and Aeromotive regualtors. You really can't go wrong with either. I think the Aeromotive's look nicer than the Holleys.
Eddie