That casting number was used on a few different bore blocks. So you'd really need to measure the cyl bore. 4.05 is a 390 or 360. 4.13 is a 428. 4.23 is a 427. Keep in mind overbore when you measure. The C8AE-6090-H heads were used on 360's to 428's including the 390 GT engines. Pretty much stock heads. A forged crank will have a somewhat wide smooth parting line. Not as sharp and pronounced as the cast nodular iron cranks. Pretty easy to tell them apart. Factory forged cranks will have a $ symbol on the edge of one of the counterweights along with a part number. Some were crossdrilled and those will have either a cup plug held in by a C clip or threaded plug on the face of the counterweights from where they were hollowed and drilled. The crossdrilled cranks also retain some 13 grams of oil. Forged cranks were mainly a 3.78 stroke although there is a shorter 3.50 stroke forged truck crank. There is also a wider snout 391 forged truck crank. Cast cranks can be ID'd by a number cast into the edge of a counterweight. Here are a few of the more common cast cranks.

360 with a 3.50 stroke 2T and 2TA
390 with a 3.78 stroke 2U, 2UA and 3U
428 with a 3.98 stroke 1U, 1UB and 1UA (SCJ)

Take a look at the rods and see if they are capscrew or nut and bolt style. See if you can find a number on the side.

The Edel intake should have some sort of name or numbers. F-427, RPM, Performer etc...

Poke around a bit for some more info if you can. As you can see there are a few different combo's it could be.