I am in Warrenton, Virginia. If you are looking for an engine machine shop near Woodbridge I highly recommend Dave Lucash in Opal, Virginia (http://www.proautoperformancecenter.com/). He did my 1941 Plymouth engine (included re-sleeving one cylinder) and my 1956 Thunderbird Y block. He was very timely and I was very pleased with his work. Nice guy to work with.
Jim Yergin