Originally Posted by 454C10
781's are 120 to 122cc and make 7.7:1 cr with a set of flat tops.
781's are decent heads but require the use of a domed piston to get the compression up.
You know they have to many websites that have the wrong information. I just looked that info up last night on nastyz28.com. 454C10 would you be able give an answer. Will the 454 Vortecs heads work on the early bigblocks with flat top pistons like they do on early small blocks? Anybody else?