I got these back in the fall with a bunch of 440 stuff I bought.
Are these factory production or some type of aftermarket adjustable rocker arm assemblies? What's the ratio?
They also came wrapped up with a pretty big Crower cam and pushrods...cam numbers indicate a .234 at .050 with .565 lift. Would they be compatible with the cam?
I know what the small block stuff looks like but I've never had a set of these for a big block...Thx...

I think most of those were sold A/M through Hustle stuff or direct connection. There were at least two different suppliers crane, and ISKY.
Your appear to be crane as the ISKY ones had hardened pads on the valve tip ends. I know you could get 1.5 and 1.6 ration in them , but I am unsure how to tell the difference.
As far as factory production most every BB Chrysler outside of a max wedge application were non adjustable HYD. cam applications.
Max wedge rockers are different from the ones pictured as well.
Overall those rockers are good rockers some like to have bushing installed before using them.
Matt

Those look like the Sig Ersons I have on my BB.Bought mine in 71.They still do the job. I did have to replace the adjuster screws though.Rocky

they look like cranes; probably 1.5's. the adjusters are from an early A engine and have an interference thread. they don't use a jam nut but somebody has installed them anyway. you should take everything apart and check the fulcrums.

Look like the Sig Ersons I had. And they will be fine with that cam, just check for rocker to retainer clearance. I had to buy roller rockers because my Sig Ersons didn't clear my springs/retainers.

Thoose are Ersons according to Gary at RAS, I sent him a bunch of different brand rockers, some had Crane cast into the bottoms, some had Erson cast into them, some where the good early Iskys and some where the OEM M.W. and some had nothing on them. The ones that had no I.D. on them look like yours and Gary told me that those where the later Ersons I wanted him to rebuild, bush and change the ratio to 1.6 on all of them, he can't do that on the later Ersons according to him IHTHs BTW, you can figure out the ratio by measuring the lobe lift with the cam in the motor and then put the rockers and pushrods in and set the lash at zero, put a one inch lift dial indicator on the valve retainers and rotate the motor through two revolutions, see how much lift is at the retainers and then do the math to see which ratiio your rockers are IE, .400 lobe lift and .600 at the retainers = 1.5

Those adjusters look like the interference-fit such as those used on the 273.

Some of mine looked that also I don't remeber seeing any stock OEM adjustable 273 rockers with the lock nut on them like those have

Crower use to have an adjustable rocker that looked like that for the BBM with the interference fit adjusters.

My early Ersons were interferene fit adjusters.They finally quit staying so I bought a set of MP adjusters.They work just fine.Mine have been in use since 71 or so.Rocky

I'm thinking the nuts were added after the adjusters lost their fit with age.

TO the OP,

Dollars to doughnuts those are 1.5 rockers. My guess is based on the fact that it hasn't been until relatively lately that increased rocker ratio has become a big thing. Also, it wouldn't be uncommon for the manufacturetr to cast a "1.6" into the rocker to indicate it's not stock ratio.

I don't think the cam is big, except for the lift which is pretty high for 234@50. I am guessing mechanical solid?

I think you got lucky with the rockers, they should work fine.

R.

dogdays...sometimes I think half of this hobby is luck...
The rockers being an early Erson would make sense. The guy I bought everything from was into 440's till about 1976 and for whatever reason something happened and he never really messed with them again.
The 67 440 blocks I bought from him were disassembled in 1974 and covered in grease then.
They hadn't been moved or looked at until last fall.
I can confirm the cam was a Crower and the actual #'s were 265/267 at .050 and .574-.585 lift with a 108 lobe centerline.
I planned on running a cross-ram (I have a super nice hood with the two holes already cut in it) and am really thinking about using the Erson rockers and the Crower cam and lifters set on top of a decent set of 516's I have for the 413 (or a little more)in my 65 Bel II. The car is set-up for a stick and I planned on running 4.56 gears with an overdrive. Not worried about a lot of top end power but that combo should make decent torque.
Thx to all for info...