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bignbad60
06-13-2005, 06:58 PM
How do you tell by the stampings the difference between the 3830814 casting numbered blocks when it came to 409 or 427 ? :?
SS425HP
06-13-2005, 07:17 PM
The 427 blocks had the deck stamping of QM. The blocks were the same, other than that. Not sure what the mystery motor was stamped, or even if it was stamped. I've been told it was a completely different block.

Fred
MK IISS
06-13-2005, 07:58 PM
"I was able to start with a clean sheet of paper. Displacement remained at 409ci. Virtually the only dimensions retained from the W-engine were the bore centers of 4.48 in. and the crankshaft-center-to-camshaft-center distance."

D. Keinath
bignbad60
06-13-2005, 09:15 PM
The confusion being, saw a block on ebay ( see ebay related post )...checked casting #'s on mortec site...http://www.mortec.com/wmotor.htm... and they show same casting used for 409 and 427...so I'm just trying to figure out what this block is and what it might be worth...I figure it would be $'s if it truly was a mystery 427 block....

http://www.mortec.com/wmotor.htm
SS425HP
06-13-2005, 10:03 PM
The 427 referred to was the Z-11 427. Still the 409 style block. Was stroked to get 427". From 3.5 to 3.65. The 814 block would not be a mystery motor block. The deck stampings on the block at the right front would tell what it was. QB was a dual 4bbl engine, QA was 1 4 bbl 400 HP. The 427 Z-11 block was stamped QM. There were others, but these give you an idea how they marked them.

Fred
jim_ss409
06-13-2005, 10:27 PM
I think there was about 17,000 409s built in 63 with that casting number. There was also about 50 Z-11 427s made with the same castings. The odds are it'll be a 409. I don't think there was any differences you could look for, except for the deck stampings like Fred said. They had two bolt mains just like a regular 409 and I don't think there would have been any extra machining needed for the extra stroke.
Fran Preve
06-13-2005, 10:37 PM
The mystery motor had the same timing cover, oil pan and fuel pump, except for the 90 degree head bank it was the same as the 409. The crank and rods were the same as the 427 engine used in the Z-11 package.
Ronnie Russell
06-13-2005, 11:16 PM
bignbad60, The guy selling the block also has the crankshaft for sale in a seperate auction. 409 crankshaft
MK IISS
06-13-2005, 11:25 PM
bignbad: the block on ebay has a "QG" suffix code which I believe is a 340 horse 409.
bignbad60
06-14-2005, 12:15 AM
Thanks guys, I knew I could count on you to staighten me out on this !!! :bow