its gonna be a much more user friendly set up for you Russ... the only thing I would suggest is that you consider building a tang/strap so that you can attach the lower block out farther on the "lever" that you are pulling on to lift the motor, as it will give you much more leverage, almost a third more, from where it is attached as shown in the photos.I've actually been working on this modified engine lift for a wile now, but just finished it up today,
my lower block is mounted on a tang from the top pivot bolt near the outboard mounting plate, and lifting my honda (100lbs) takes about 25lbs of pull when its in the full down position, which from a sitting position and pulling sideways like I do sometimes, its about all I want. the closer the motor is to the top, the angle of the purchase lead allows it to pull a lot easier.
if I stand and pull, its not an issue at all.
and I think I have a 5part tackle..... a 2 sheave becket block at the top, and a 3 sheave block at the bracket pivot bolt...
the up side is, I dont usually have to hoist it from the full down position because, either there is more shaft in the water than necessary in calmer conditions, or in not so calm conditions the heavy wave action submerges the motor head, which has happened enough times that I dont like to lower it all the way anymore... the submersion is only momentary and doesnt cause any harm as long as it IS only momentary, because like a jet ski, there is enough air in the cowling to allow it to continue on until it surfaces again... most outboards are designed with extreme wet and possible momentary submersion in mind...