273 rockers on e-heads
Anecdotal side track……..
I had some of those heads sent to me for a look over a few years ago.
They were built from bare castings.
Found a few things that weren’t great…..
As soon as I took this head out of the box I noticed the one spring was bigger than the others.
Also, in addition to the ex valves not really being the correct length, they also had a longer groove-to-tip length. Which combined with the shorter overall length resulted in an even shorter installed height for the exhaust valves.
So, the bigger longer spring, installed at the shorter exhaust installed height ended up as a combo of parts that was coil bound at a bit over .500” lift.
Of course, none of that was any fault of the heads.
Anecdotal side track……..
I had some of those heads sent to me for a look over a few years ago.
They were built from bare castings.
Found a few things that weren’t great…..
As soon as I took this head out of the box I noticed the one spring was bigger than the others.
Also, in addition to the ex valves not really being the correct length, they also had a longer groove-to-tip length. Which combined with the shorter overall length resulted in an even shorter installed height for the exhaust valves.
So, the bigger longer spring, installed at the shorter exhaust installed height ended up as a combo of parts that was coil bound at a bit over .500” lift.
Of course, none of that was any fault of the heads.