Hello, I'm mocking up my new Callies block with Indy -1 heads and T&D rockers. Going to be a 511 cu in pump gas bracket engine. It quickly became rather obvious I'm going to have to do some major machining to the block for pushrod clearance. Indy says they have a CNC program but no pics. Would anyone happen to have a pic of the lifter valley after machining?

This is an old Mopar Mega block. But it's been lightened up including cutting the lifter valley. It originally was purchased as a short block from Indy by a friend. So I'm assuming it was their program
Doug

I don't have exactly the pic you want. But if you look at the Cometic gasket in the pic above, and on my pic...
I had 440-1 CNC 345 heads on a KB aluminum block (so ignore the block). Look at the tracing of the Cometic gasket, the tracing of the 440-1 head, and the location of the head bolt hole. I labeled the area that needed cutting. You don't have to remove everything like the Indy program (for lighter weight), but you may (likely) have some clearance work on the valley wall also.

I'm diggin the shade of orange on that block.

Pushrod clearance in the block & head is affected by PR diameter (duh) but also how much oscillating movement is present at the PR top with the short (PR side) rocker arm lever.
If you're going to open the holes, the new shape must of course allow the larger diameter, but a greater sweep at the RA is not a larger hole diameter, but a "stadium" shape: a circle @ correct OD, expanded with parallel sides.

I should add mine runs -1 heads and 7/16" push rods.
Doug

Straight or tapered?

They are tapered at both ends. But not far enough that it alters block clearance. I did have to gring just a little on the heads for the intakes. It uses offset intake cups in the lifters as well.
Doug

Doug,
I think you and I are both running the Comp Cams 7/16" pushrods. 0.165" wall thickness.
This is where the taper is (both ends).

I like and use Manton pushrods for all my builds due to them making them when I order them. They don't have any shelf pushrods, all custom made when ordered.
The series 5 are my choice for race roller cam motors, I've seen 8 HP gain above 5000 RPM with no other changes than swapping out a set of Smith Bros,. 3/8x.120 wall to an Identical set of Mantons Ph.# 951-245-6565
I am a dealer for them and I can save you a little money on them, no a bunch, sorry They will drop ship them directly to you if you order them from me: Cab

Run as large(diamter) a pushrod as your wallet can afford. It does not matter in weight to the valvetrain but flex IS an issue. How much depends on spring pressure and cam ramps. Of course as you go up in diameter clearance becomes more necessary.

The shape is the same. But mine are steel color, not black. There is no name on them. Just length, diametre, and wall thickness numbers that look like yours. I was told they are Trend. I purchased them used with the heads and T&D paired rockers when I built the car in 2012.
Doug