Stage II On Center Block 4.1 Liter
Casting number 25500153 with modifications



Features of Note:
  • Notice the solid lifter valley with oil return being accomplished at the front (left) of the block through a bolted and epoxied in screen..
  • Notice the knock sensor provision ( hole on right side of picture)
  • Notice the oil return fitting on the rear of the block (right) that returned oil to the oil pan through the valley
  • Notice 6 bolts per cylinder and studs
Features of Note:
  • Notice the plate, epoxy and screen bolted to the front of block for oil return from the top end
  • Notice fitting for oil return to the back/top of the valley area
  • Notice the tapped plugs for the cam oiling galleries



Features of Note:
  • 4 bolt main caps (billet steel)
  • Outside bolts of mains are splayed
  • Cross bolted mains
  • Somebody ground the oil pan lip off the right side of this block for some reason
Features of Note:
  • Notice part of a gear drive arrangement still installed.
  • Notice plate around front cam journal for gear drive mounting

Submitted by:

Todd King