i JUST BOUGHT A SET OF 434 CYL/HEADS THAT HAVE BEEN RE DONE TO 202/160 CAN ANYONE TELL ME THE SETBACKS OF 434 HEADS? i HAVE LOOKED ON LINE AND i COULD NOT FIND ANTHYTHING ON THE 434 CASTINGS THANKS FOR YOUR HELP

NO NEED TO YELL!

OK is this better lower case!!!!!!!!! I wish i could! well never mind just looking for info on 434 heads that's all

354434.....75-79...262/267/305...60cc chambers
These are small port heads, why anyone bothered to install big valves in them was kind of pointless since the ports are so small, if the chambers haven`t been deshrouded they`ll be even worse. I see lots of these on Ebay listed as "high velocity" heads, this is true, since the small cubic inch small blocks needed high velocity to generate enough torque to move the vehicle around, but on a larger small block, they`ll give explosive power out of the hole, but dead players past 4000 RPM. these heads with the big valves on a small cubic inch engine like listed above, the valve will hit the bore. so the set backs are listed above, also beware they are light casted, don`t run them hot.