Wow... Leaving out the top bolt cuts down your clamping force by 33%... I couldn't do that and feel safe. True, the top bolt is tuff but a really long extension will work fine but... It needs to be around 3 ft long to clear the motor mount cross member. I use all 3/8 drive rackets and extensions. I use electrical tape on the socket to bolt and socket to extension. That way the bolt is help firmly in the socket till its installed tight. Then just pull back and everything pops off. Usually the side bolt goes in first just to hold the starter in place.... These mistubishi gear reduction starters turn the engine so fast you can't count the revs. this faster turning engine during the start cycle makes much more heat because the air sucked into the cylinders is being compressed faster..... the faster you compress air the hotter it gets. Do you not believe this... Try hand cranking the engine and see if it will start... You can't compress the air in the cylinder fast enough to make any heat... Heat is what ignites the diesel being injected in the precups and cylinder....