so - as you can see there are two distinct schools of thought when it comes to picking the engine out - you'll probably have to do what we have all done - decide for yourself. Heads?? on or off - but most will agree you're better off leaving them on. Bolts??? tight! Not "holy **** are you kidding me" tight, but tight - if I had to wager a guess as to where I usually get them - 30-40 foot lbs...