My block casting # is 330817..
The head Casting # is 3998997
The date code I believe on the heads is C2673..

To me, the block n heads are '73 400ci..

Can anyone tell me if this is correct, and what the hp ratings are on this block n heads..?

I also found out the rocker arms are comp cams 1.52 rollers... Is there a casting # located on the camshaft? I would like to know what cam is in there so I can find out what the motor is really making HP wise...
Other than that, it's got a performer intake n holley 650cfm spreadbore carb...

Any help??

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1981 Z28
400c.i.SBC/th-350 w/shift-kit/3.73posi-trac
http://community.webshots.com/album/62458787EPGyeA

Ahhh...Just listen to that cam...