How are cattle slaughtered?
Adult cattle must be restrained in a stunning pen which is usually a solid-sided metal box with a vertical sliding door at one end to allow the animal to enter. The pen must have a device that restricts the movement of the animal’s head to permit accurate stunning. The majority of cattle in the UK are stunned with a captive-bolt pistol. Alternatively cattle are stunned using electricity or stunned and killed using electricity (by applying an electric current to the brain and heart simultaneously).
If using a captive-bolt, the slaughterman stands on a platform, in front or to one side of the pen and shoots the animal in the head between the eyes and the ears in order to accurately target the brain. The pen side then opens and the unconscious animal rolls out of the pen, is shackled by one hind leg, hoisted on to an overhead conveyor and moved to the bleed area. Here the animal is bled by the severance of all major blood vessels supplying the brain with oxygenated blood. This causes rapid death. The animal dies from loss of blood before it makes any recovery from the percussive stun.
Humane Slaughter Association: https://www.hsa.org.uk
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How to clean, inspect, and determine what you can do with your cylinder head. Also how WHAT you do affects your oil system. There are many variables at play when you make changes to your cylinder head deck from your oil system, compression ratio, your valve timing and potentially even disaster. ‘best not to go that far with it. Watch this video and avoid it if you’re building your own 4g63 head.
The differences between this head and a 1g head are mostly related to port sizes on the intake and exhaust, and different sized head bolt holes. The 7-bolt uses an 11mm bolt, and a 6-bolt uses 12mm. 1g heads have gigantic intake ports, but aside from that, valve geometry, oil system functionality and the service limits are all the same.
Also, click these links for in-depth discussions about oil port modifications for all generations of Mitsubishis, and specifically for 2g head installations on a 1g block.
4g63 Oil Port Modification:
https://www.dsmtuners.com/forums/newbie-forum/341028-4g63t-head-oil-port-mod.html
2nd gen head on a 6-bolt block:
https://www.dsmtuners.com/forums/cylinder-head-short-block/341885-oil-port-mod-2-4g63t-2.html
Possibly 2 of the best threads on ‘Tuners for anyone considering a 1g-in-a-2g or for anyone that wants to know everything about a DSM oil system.