Presently I am -3 on that test. The plan is to raise to that height.
I measured this evening.
I got :
4 1/2"inches from top of flame arrester to hatch.
33" centers. Gils
1/4" between manifolds
My outside mounts rise 6" of stringers.
Center stringer 18" height. Mounts stick up 1 1/4 " Perfect.
29 1/2"between stringers.
Engines are 52" long
2 1/4" tailpiece clearance to inside flange.
Wedges under tail piece at gasket surface. I can raise engine and remove wedge, Perfect.
3" to radius at rub rail on transom.
Couldn't be easier to raise drives. Little parts needed. Bunch of labor. I will see exactly how much time.