i was used to a v8
my work 110 carries logs it is often like most arb trucks at max load carring capacityif it was a chelsea tractor type of landy then yes i agree
with the loading and the tyre size of a 110 i was happy to keep it at the factory ratio but have the later cut gears
only burst discs i use are on the paintball regs and when one goes next to you it makes you jump
nothing comes out of them as they're held in place by a nut which has a vent in
My solution is along the same idea as stopping a patterdale terrior barking out of the window- brick the window up
ensure the floor has a hole for any water that leaks in to exit as fast as possible
the one we have when new was stupidly expensive
what capacity has your mill width wise and is it worth doing half a dozen adapters whilst you are set up
i run vented on the front and solids on the rear in my 110s but i do carry a fair bit of weight and tow well loaded tralers and we have big hills in gods country
with a 3 jaw it takes a bit of buggering about to get it back true after you take it out so plan your steps and if possible do it all in one go
one thing to check is your tailstock is aligned with th head stock
one thing i do is try to do any tapping first then with a mandrel turn the out side concentric to the thread
once you get used to a 4 jaw it's not bad but tbh i very rarely fit ours as it weighs a ton and i don't often work on stuff that needs it,i do use it if i setup a collet holder
you could try load testing a single modified bolt ,maybe two bits of ally with the same thread engagement and head contact area
using your engine crane or gantry pick up say 250kg ,if it takes that then i'd not worry about it
i would think the hardend dowels play quite a part in stopping twist as bolt holes have clearance so allow movement but the dowels have a tighter tolerence
i can't see there being a great deal of pull force on the bell housing as once it's on the mounts it has little room to pull apart as if one part flexes the other mounts go the same way