I'm had my engine work done at Performance Specialties Inc (205-841-7790) in Birmingham. The owners names are Rick Pennington and Al Moore. They did an excellent job for me. They do all the machining, balancing and dyno work in house. My engine was a 351M and we used Tmeyer's 400 pistons, .030 overbore with a 400 crank to get 408c.i.. We used an Edelbrock 400 intake, Comp 255deh cam and a 600cfm carb with headers and it dyno'd at 339hp@4300 and 478ft/lbs@2900. Obviously this is a mild build compared to a stroker 434, but was a huge difference in original form. I know it would be little bit out of the way from Hunstville area.
My transmission work was done by Performance Torque Converters (www.ptcrace.com) in Muscle Shoals (256-383-6868). They do a professional job and after rebuild they dyno your transmission to make sure the pressures and shift points are correct.
I hope this helps you some.