d_ford Doug you may not like this but from the numbers you gave,
C4AE-F CASTINGS ARE FOR A 390 PI MOTOR, solid lifter police special
It is easy to convert the bottom end from 2 main caps to cross drill. I have a 390 block that was sold to me as a 428 block and got the main caps,#2,3,4 to convert to a cross drilled block.
The head numberC80E-N IS A 68-70 428CJ OR SCJ HEAD NUMBER this head comes with 2.08" intake valves and 1.66" exhaust valves. cambers are 73cc-76cc.
I have used this ford parts identifier for years and to date have not gotten wrong info out of it. I would also tell you to go on the FE forum and ask these questions again, There are some real pro's with all the correct info.
I am going to suggest this to you, if the price is good, you want a receipt from him, in his writing with a 3rd person present at the time of buying to witness this and have him write down what is in this motor part numbers and all the casting numbers you can find. If down the road your machinist fines out there are problems you have a recourse to get your money back. Don't let this motor sit for the next 2 years in your garage. Buy it, send it to a FE machinist for pull down and inspection of cylinder walls. (sonic check). Have a basic rebuild done. Side note, you might want to think about running a stroker kit in it instead of rebuilding parts inside already unless this motor is going into a parade car or used for EASY driving.
Barry R. sells great stroker kits that are balanced. All the parts are new. Something to think about. The other thing is BBC rods have wider bearings than FE rods and weight a little less. 3 years with his kit and abusing the hell out of it, very happy. Rick L. If you want to talk more,send me a PM.