An "alternative" would be to use a small remote booster like a VH44.
This will greatly reduce the pedal effort required.
Another risk you're all running is stress fractures of the firewall/bulkhead where the Master bolts on, haven't seen it in a Supra but have in a few other cars in the past.
I was going to suggest that but I thought "Nah no one could be that stupid"
<shhhh I only know cos I did it way back couldn't work out why my car would run fine on LPG but would only idle on Gas when it was dual fuel) :D
Frank: There should be more than enough "give" in all of the braces to allow the head to be torqued without undoing any of them.
(otherwise the braces would break their mounting points due to disimular expansion rates in the head and block)
We tend to view a motor as a very ridgid structure...
SD: Nope not even close it often takes 100+ft/lbs to break em loose so pulling back till they crack is the best way I've found to get an accurate retorque.
As you're NOT backing the tension right off it's safe enough to do it this way.
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