This has probably been covered in the past but is there a clear favorite among those herefor an aftermarket engine build(HQ, GMR, etc.)? I thought some of you might have experience with several of them. Thanks.
R&R does our CNC porting for us, to our specs and the rest is a package we put together. I would go with a package to ensure that you are able to end up with the power and tq in the rpm range you are looking for as a end result. The biggest mistake that most make is not putting together all of the parts along with head porting to allow them to work well together.