ClassicOldsmobile.com - View Single Post

70Wcars · 01-27-2008, 07:04 PM

This may sound complicated and Norm's method is dead-on accurate, but here goes.

According to Mondello's engine tech book, which has been questioned for its accuracy, a block cast with your number and the .842 lifter will be a 45 degree block. A block with your number and lifter size will be a 39 degree block IF you also have a " drill spot " on the block. I have worked on a couple of these and the drill spot is located on the small raised part of casting that is in front of the oil fill tube and goes from the base of the Intake manifold end-rail forward to the back of the water pump and looks like someone started to drill a 1/4 " hole and stoped after about a 1/16 th of an inch of depth.

Hope this is not too confusing...I still trust Norm's method the most.

Danny

01-27-2008, 07:04 PM	#5 (permalink)
70Wcars Member Join Date: Jan 2007 Location: Texas Posts: 55	This may sound complicated and Norm's method is dead-on accurate, but here goes. According to Mondello's engine tech book, which has been questioned for its accuracy, a block cast with your number and the .842 lifter will be a 45 degree block. A block with your number and lifter size will be a 39 degree block IF you also have a " drill spot " on the block. I have worked on a couple of these and the drill spot is located on the small raised part of casting that is in front of the oil fill tube and goes from the base of the Intake manifold end-rail forward to the back of the water pump and looks like someone started to drill a 1/4 " hole and stoped after about a 1/16 th of an inch of depth. Hope this is not too confusing...I still trust Norm's method the most. Danny __________________ Dan S 70 442 W-30 4-speed 70 442 W-30 Post Coupe Bracket Race car..11.43 @ 3650lbs.