Braboy,
If you come down I75 to Gainesville and get off at the Williston Rd exit (382) A&D Sales and Service will test them for you. He charges $4 per injector usually though sometimes he'll go easy on you, especially if you buy something else from him. He's a good guy but has no competition in Gainesville, so he charges what he wants. Very knowledgeable about Stanadyne and CAV fuel systems no doubt. His name is David, and he's only there working hours M-F. He is in this industrial park just down SW 34th street from the interstate. You could also check with some Stanadyne shops in Jacksonville if that's easier for you. I've dealt with "Diesel Powerhouse" in Callahan. Good guys, but I don't know what they charge for pop testing injectors. PM me or more info.