Originally posted by Littleport22
I finally ID'ed my engine and it turns out to be a 427 Chevy Tall Block. I found a lot of stuff at www.MORTEC.com but not as much as I might like to know. Here's what I have:

Block: 473478 (427 Tall Block - 4 Bolt Main)
Casting Date: K 1 78 (November 1, 1978 (the 8 is fuzzy))
Next to casting date: Marine GM8
Inside the BellHousing: Drivers side - "F" Passengers - "TRUCK"
Drivers Side over oil filter housing: Truck 7 (Upside-Down)

Head Casting Number: 343772 (427 heads)
Inside, Top, Front of head: 26 74
Behind that: GM4T
Behind that: GMC

How good is this engine? What are it's weaknesses? Can anyone tell me what vehicle this came out of? Thanks!
weakness there is none the block can take a lot of hp . but they do not fit good in to a lot of cars and take a lot of work and money but you can get 525 cid out of them the engine may came out of a dump truck or some thing like that