Customer bought a engine, brought me a bunch of parts, brand new indy heads, but I have no paper work on them, and nothing telling me what they are. I thought the SR used all stock top end components, but the -1 uses offset rockers. are there any markings or cast numbers on them? They are currently at the machine shop getting set up for solid roller, so I dont have them in front of me.

I thought the Indy-1 used special studs too.

Any info is greatly apreciated.

Kasey

Correct.

The SR can also use the offset rocker though. As far as markings...I think only if they've been CNC'ed. Otherwise you're at the mercy of measuring everything to try and figure out what they are. Both heads use the same studs/bolts.

So I can run the standard rockers on a SR or -1 head?

Would a picture help? Ive got 3, nothing into the intake ports though

heres some pics

Those look like -1's because there is no pushrod clearance in the side of the intake port. They need an offset rocker, you cannot use a normal rocker on the -1 intake side.

For sure 440-1 heads.

Thanks guys!!

Ill get the expensive rockers coming LOL

Do I go ahead and use the "indy" specific head studs also then? Mancini shows 2 different ones I assume the deck is thicker on a -1

The 572-13, and 600-13 heads use taller studs. The 440-1's and SR, use the same set, and are taller than stock type heads.

thanks

The SR heads intake ports narrow down around the pushrod pinch area like the stock M.W .heaads do, the 440-1 don't
I think some of the early SR heads had 440 cast on the rocker arm pedestal on one end or the other and the 440-1 had that cast into them in the same place, maybe not

This pic is an older 440-1 head, but the locations are the same.
The 440-SR will have a pushrod hole machined in the side of the port casting (yellow circle). So the inside of the port can't be as wide at that location.
The 440-1 will have the pushrod go outside the port casting (blue circle).

See anything like this ... on the intake mounting surface

I found this old pic I have.
It is an Indy 440-SR and you can see the Indy pushrod hole machined in the side of the port casting.