Bought these at Mancini racing. There are no part numbers or Chrysler logos on them so I cannot say if they are NOS or not. The set I use work well on my engine.
They do require 4 spacers per side. They can use the same spacers and hold downs as factory 273 mechanical rocker arms. . Factory used solid spacers but I have springs used also.
They do require 4 spacers per side. They can use the same spacers and hold downs as factory 273 mechanical rocker arms. . Factory used solid spacers but I have springs used also.
Mancini racing also has spacers from Harland Sharp. I measured the stock mechanical rocker spacers and they are 0.35" wide. With the aftermarket spacers you can buy a couple sizes and get the tip alignment more precisely than with the one factory spacer.
I'm interested in the 1.5 mechanical rocker arms. I saw you wrote they came from Mancini. Do you have a part number or something that would give a product description? Also, is the price negotiable (I actually only need 8 of them but would buy all 16 if need be). Thanks.