Re: newbie question
Most builders do not disassemble the engine before installation. It does not hurt to open the outer engine cases on each side to see than nothing is loose and you can remove any metal debris from assembly. That can normally be done with a flathead screw driver. Some guys also remove the intake and exhaust manifolds to clean up the inside with a small file or dremel. A 10mm wrench or adjustable wrench will accomplish that. Niether of the afore mentioned are required. The members that do have engine building skills do often check out the entire engine before mounting.
“You're only young once, but you can be immature as long as you like" -Unknown