i was wondering if i shipped u just the whole engine, what would installing a +3 crank, agg trail porting for the 3 mm, ken o'connor head, and flywheel lightening run me with shipping and all.... also with the new head would i need higher octane gas i usually run regular (ik i shouldnt run less than 90 octane but i use my parents gas and they use it for lawnmowers and stuff)