What do you all think about Arruzza performance?

While I have never bought anything from him I tried. Meaning, I called him to place an order for some parts and he advised me that what he had available wasn't the best for my application. I was impressed that he took the time to assess my needs and steered me in the right direction. He could have just grabbed the money.

I bought some rockers and stands from him ok guy to deal with.

Bought some heads years ago. Good deal and just as described. I'm happy from my dealings.

I bought a 572 hemi from him, he went into great detail explaining everything to me.He told me everything that went into that motor(parts) and everything he does.
It's been 5years now and no problems at all.Took the motor out of the crate and had it installed with only a minor idle adjustment and it was running.
He was very easy to work with and I bought other parts from him as well.Good guy.

My bud bought a big inch Hemi from him. He recommend a huge roller cam for the street. At that time he used Norris rockers. Three pushrods cups and adjusters burned up from lack of oil after less than 1000 miles. He recommend a new set of roller lifters and we bought three new adjusters and pushrods. I did not like the new lifters so we used the old one and just replaced the broken parts. That lasted about 1000 miles before 8 pushrods and adjusters burned up. We called him back and this time he said that he never put Norris rockers on ANY of his motors. Hmmm. Ok. This time we called Tim Banning. He said Norris rockers are bad about not oiling and burning up pushrods, especially with big roller cams. We bought all new stage five rockers and have not had any more problems. After 7 years of trouble free operation, I think we fixed the problem. Cam is still too big though. After all the trouble you have had with your Hemi, I would not use anyone but Tim. I'm building an alum Hemi from Tim right now and he is a great source of parts and knowledge.
Other than the rocker problem, the motor runs fine and makes plenty of power to destroy two Kesler five speeds. Now that's another story altogether.

^^^ sounds like the guy I dealt with. Never again. Nice fella on the phone, sold and sent me wrong parts. I had to eat them. Avoid Arruzza at ALL cost. Go see BG or Banning or Marsh. Do it right the first time. Arruzza is a shady character.