Robert Fulco is the best around from what I have gathered and he is doing my new R block motor right now. I did a shit ton of reserch on this and never got anything bad back about him other than being a little slow, which is fine with me. I asked around on Corral a year or so ago and random people from all over chimed in with his name when they heard I was located in South Florida.
A quick background on him, he has been at it over 30 years, does all of his own machine work (has it on site), did all of the R&D for TRD / Toyota for the Scrantons record setting Celica, built the motors in their Mustangs too. Also was hired to get Dodge back into NASCAR a few years ago and did a lot of their motor development.
He is not brand loyal but seems to take a liking to small block Fords. Most of all you get what you pay for, so he is not the cheapest but doing it right once is better than doing it wrong once plus having to do it again.
PM me if you want his contact numbers.