Isky ductile iron rockers

[PRHeads]

the third version which is probably what your catalog shows came out around the early 90's looks like it's a reboxed Crane rocker except it has Isky cast into the body

I actually got a set of the reboxed Cranes…….that had “Crane” cast into them.

 

[1 Wild R/T]

I actually got a set of the reboxed Cranes…….that had “Crane” cast into them.

Not even trying to hide it...

 

[Sinitro]

Many years back...
I installed Isky adjustable rockers on my 383 and had to mill down the tabs too get the proper lineup.

Just my $0.02...

 

[PRHeads]

Here are mine……. Narrowed to Crane width…….. and lightened a bit.
I couldn’t see the point in that big knob way out at the valve tip.

 

[khryslerkid]

Factory hold downs are a bit crude. I used aftermarket ones then filed them for better alignment

View attachment 1627794

View attachment 1627795

I definitely would have used those if I would have known about them.

 

[DPeltz]

I have a couple sets of Isky rockers from the 70’s. I recall them needing some work as stated to get them centered on the stems. Last refresh, tried a set of H Sharp. Needed a bit of work also. Try your best to get it right the first time, then relax and enjoy your ride.

 

[Cranky]

Yup, need to modify the hold downs with the Isky rockers. I also like to use spacers and ditch the springs and like what you did to the rockers @PRHeads

Had a 10.60 car that saw 7300 on every pass and the Iskys did just fine with a .660 lift roller cam. Now a days a .660 lift cam isn't all that big but it was 40 years ago lol. Geez, been that long ago already.

 

[Geoff 2]

I had a look in my 1978 Isky catalogue & the pic looks exactly like the ones the OP has.