383 rocker shafts and rockers? toss?

[Cartel]

The shafts arent rolling flat on the table, maybe they will lie down when bolted to the head?
Also the rockers have the valve stem wore into them, can I file them down?
The shafts have rub marks but actually have no wear.

I can actually lay the shaft on the table and with just my hands and body, hold the down flat with my body weight

I'm trying to stay away from China junk and I need to clear the 1.524 springs, which these do when I mock it up.

Can I salvage these 1966 parts?

thanks

 

[Cartel]

 

[jimjimjimmy]

Those rockers look like they were rode hard and put away wet .

 

[Cartel]

Those rockers look like they were rode hard and put away wet .

They been in there since Operation Double Eagle

 

[Garrett Ellison]

What 1.55 springs are you running and what cam will you be using?

 

[GTX JOHN]

The shafts WILL straighten down when bolted to the heads = No Worries.
But the wear where they ride on the valve stems is worrying to me, although
it is hard to assess in your pictures.

I would spend the money on adjustable cast rockers, If it was my call!

 

[Demonracer]

X2 on the rockers arms!

 

[Cartel]

What 1.55 springs are you running and what cam will you be using?

comp 911 sorry they are 1.524"
comp 21-224-4
0.488 int./0.491 exh.

What did Richard Petty use on his wedge nascar engines? stamped rockers?
anyone know what they allowed back in the 60s-70s?

 

[Garrett Ellison]

I second the vote for quality aftermarket ductile iron rockers. Being they’re from 1966, you’re probably getting near the end of the fatigue resistance of the factory rockers. If this is the first time using the upgraded springs, you may eventually see the pushrods punch through the rocker body.

 

[Newbomb Turk]

comp 911 sorry they are 1.524"
comp 21-224-4
0.488 int./0.491 exh.

What did Richard Petty use on his wedge nascar engines? stamped rockers?
anyone know what they allowed back in the 60s-70s?

Polish the shafts. I’d do some measuring in the rockers. If they don’t measure out just buy some new stamped rockers.

You aren’t using enough cam to warrant adjustable rockers.

 

[Bewy]

The valve tip indents on the rockers can easily be removed, done it many times. Rub with 180 Emery paper until removed; bit of elbow grease needed, but it works. Alternatively use a Dremel with small cartridege rolls.

 

[440 Mike]

comp 911 sorry they are 1.524"
comp 21-224-4
0.488 int./0.491 exh.

What did Richard Petty use on his wedge nascar engines? stamped rockers?
anyone know what they allowed back in the 60s-70s?

Wild guess.......Max Wedge type ductile iron adjustable rocker arms.

 

[Cartel]

Wild guess.......Max Wedge type ductile iron adjustable rocker arms.

I found this....looks like isky rockers.
From what I see, they dont allow more than 1.4x" spring clearance.
I could be wrong. not much info on the net which is a shame.

 

[Newbomb Turk]

View attachment 1716359582

I found this....looks like isky rockers.
From what I see, they dont allow more than 1.4x" spring clearance.
I could be wrong. not much info on the net which is a shame.

If they hit the springs, you need to correct the geometry.

 

[318willrun]

looks like somebody ground some relief in your rockers.

 

[Bewy]

Retainer hitting the rocker does not necassarily mean there is a geometry problem. The SBM rocker is veeeeery short, so that is going to limit valve spring/retainer OD. The op has 1.524" diam springs, probably too big. The recommeded spring from Crower for hgh rpm use is the #68405 which has a 1.040" OD. The 'standard' Crower spring is under 1" OD.

 

[Bewy]

Sorry, just realised this was a BB, not a SB. Disregard post the above post.

 

[fishmens67]

Looks like those arms got the typical egging out going on.

 

[Newbomb Turk]

Retainer hitting the rocker does not necassarily mean there is a geometry problem. The SBM rocker is veeeeery short, so that is going to limit valve spring/retainer OD. The op has 1.524" diam springs, probably too big. The recommeded spring from Crower for hgh rpm use is the #68405 which has a 1.040" OD. The 'standard' Crower spring is under 1" OD.

You can fit a 1.550 spring with no clearance issues IF the geometry is correct.

If you go bigger than that, you need offset shafts and stands. With those you can go 1.680 diameter.

If the springs are hitting the rockers, 99.9% of the time the geometry is wrong.

Big block, small block, GM or Ford, if its shaft rockers and they hit the springs it’s geometry.

The exception is trying to fit a spring where there isn’t mathematically won’t fit.

As in this case, that’s very rare.

 

[ph23vo]

TOSS THOSE FOR SURE...WORN WELL INTO THE HARDENED TIP...GET M/P HEAVY DUTY ONES IF NOT WILLING TO GO TO HARLAND ROLLERS OR SOMETHING SUPER H/D.... I HAVE A NICE SET FOR SALE ....ONLY USED TO BREAK IN ENGINE THEN SWAPPED TO A SOLID CAM.. SHAFTS AND ROCKERS.. 300.00 SHIPPED IN THE USA...LMK DAN

 

[Bewy]

Worn pads. See post #11.