Hmm, don't understand your logic... You're more likely to miss the MOT now than if you'd let them soak in a proper penetrating fluid for longer.
Rush it by not soaking the bolts for more than a day or two and snap a stud or two and then it'll take longer to sort it as you have broken studs and may need to remove engine/head to fix the new problem or spend a few days using a penetrating fluid (which WD40 isn't as mentioned in your other thread, although is better than nothing) and probably not snap any studs so a lot less hassle...
Like I said, I hope you get it sorted with a stud exctractor without having to remove engine/head to sort it.
All the best,
Chris
Rush it by not soaking the bolts for more than a day or two and snap a stud or two and then it'll take longer to sort it as you have broken studs and may need to remove engine/head to fix the new problem or spend a few days using a penetrating fluid (which WD40 isn't as mentioned in your other thread, although is better than nothing) and probably not snap any studs so a lot less hassle...
Like I said, I hope you get it sorted with a stud exctractor without having to remove engine/head to sort it.
All the best,
Chris