Yes, they can answer your question over the phone, after you give them a credit card number. They will then mail you the rest of the info. May cost you the fee but save you some cash and keep you from paying for a clone. They will need the VIN and your CC number. You could also check casting numbers by distributor to at least tell you if it was a 67 engine, head casting numbers, but even then the only sure way to verify is PHS.
Give the laziest man the hardest job and he'll find the easiest way to do it.