Looking for X Head Picture

PRH said
The X head I was doing my experimenting on was here for more substantial rework, so I took the Liberty of doing some basic rework steps, and check the results before actually diving in to what they were here for.
This was the last test I did before the big rework started……

What I did was a basic clean up of the entire port.
Some amount of guide boss trimming, diminishing the hump in the roof a bit, laid the SSR back a little more, and opened the pinch to .980”.
Nothing “maxed out” though.
That resulted in:

Lift—— In
.100— 63.0
.200—127.7
.300—180.0
.400—228.1
.450—246.8
.500—260.6
.550—266.3
.600—260.0

Ultimately, these heads got retrofitted for use with 11/32 stem valves and the seats cut for 2.055” valves.

With the guides trimmed down more, plus boat tailing behind the guide boss, the bowls enlarged for the bigger valves, more tweaking of the SSR, and the entire port getting hit with some sanding rolls, they ended up like this:

Lift—— In
.100— 66.0
.200—128.6
.300—184.8
.400—231.9
.450—251.3
.500—267.4
.550—275.6
.600—272.2
.650—263.6
.700—263.6