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Jeremy,
I measured my Allison... the lower mounting holes center point is 10.5 inches from the pad. Paul mounted the motor on the second lowest hole. This made the clamp sit about 1 inch off the top of the transom.
Dave.

My Delta is set at 10 5/8 from bottom bolt to pad, sounds good to me.
Mike

Question and answer
I found a mint, low hour 1992 70 hp Evinrude with a mashed lower unit. Will this powerhead fit a 1975 Stinger 15 inch?

This is going to be a short reply with a long suggestion. The answer is NO.
Two reasons
[1] the spline on the crank and the spline on the 15 drive shaft are different. The 1992 is a fine spline crank and the 1975 drive shaft is coarse spline.
[2] the 1975 motor based plate is for a 49 and eventhough you can mount a 56 on a 49 base plate and the motor runs, the plates are different and do not match.

Suggestion
You appear to have found a jewel of a motor. This is what I would do.
[1] keep the power head as is.
[2] the base plate in the 1992 will fit in the 15 inch. Use it along with the water tube and inner exhaust cover from the 15 inch.
[3] Take the 56 broken lower unit with the drive shaft and the complete 15 inch lower unit to a good machine shop and have them modify, cut and weld the 56 fine spline driveshaft top portion in place of the 49 course spline. Now everything will fit. You used all the parts you had and it is less costly compared to changing cranks. Another advantage is there a far more fine spline 70s out there and you can use any of them. The cranks are the same other than the spline.

thanks guys, i meant to measure Ericks at the dunnville races and forgot!

Some parts for sale.
http://www.screamandfly.com/showthread. ... m-Steering

http://www.screamandfly.com/showthread. ... Lower-Unit

what year did the 56er go to the fine spline crank?

1986 -1988 Four spline 56ci, 89 and up multi spline 56ci

Interesting comments about the VooDoo's on the Hydrostream site. Did Jim Tucker provide the comments? I am sure the 60 mph Mini VooDoo was the Black Stringer one, that I mentioned before. Less than 140 lbs makes it lighter than the Winrace hulls. I believe the stringer hulls were weaker than those with a floor. The new core materials are light and with the floor you form a triangle contruction with the V bottom of the hull. MUCH STRONGER!

Here are the comments from that site:
The Voo-doo is an extremely fun and enjoyable boat to drive, but there are several things a prospective owner should be aware of. First, it is not difficult nor all that uncommon to blow over in one! Usually when a boat blows over, you think of speeds around 80 - 100 MPH and above depending on hull type and conditions. Because of the Voo-doo's light weight, blowover is a very real possibility even at 60 MPH. The major cause is over-trimming. Though the boat can be trimmed with the bow up in the air like a typical Stream, this is a hull that should run flatter with very little trim. Blowover is not straight up and over, but rather the bow will go up and off to the side while the weight of the motor carries the back end around to the front. The result is usually hull damage.
A propshaft height 1-1/2" below the pad is best for overall use. The hull is faster at higher heights but at the expense of planing, safety, etc.

A number of people have drag raced the Voo-doo in Canada. In the early days of the Voo-doo, the transom needed to be cut down in order to be rigged with a shortshaft motor (e.g. a 650xs - a popular choice). Eventually, the factory offered the option of supplying the hull with the shorter transom to the buyer. If a Voo-doo has the standard transom, then you rig with a longshaft motor.

The prop of choice is usually a cleaver, again to reduce bow lift. However, many owners run a chopper with good success so it is best to try them both if you can.

Cornering the Voo-doo at high speeds is dangerous and not recommended. The boat will lose its grip and spin out.

Interior seating of the Voo-doo is basically a two seater though an optional seat was available for use behind the front seat. Without this seat, room behind the front seat is ample with a lot of space for storage as well as easy access to the bilge area and accessories. Some owners fabricate a cover for this area in order to reduce the "wind catching" at high speeds.

A general rule of thumb with a Voo-doo is 50 MPH with a 50 HP motor.

The Mini Voo-doo is similar to the Voo-doo but obviously lacks the area just behind the front seat. Some say it does not handle as well as its big brother. However, one person I spoke to who has drag raced both models felt the Mini handled well. His current ride: a Mini specially built for him at a super-light hull weight of 138 Lbs. 60 MPH with a 40 HP motor!

Cornering at high speeds is dangerous........Hahahahaa

SST 60 head is it 21 cc or 28.5 cc?
I was speaking with Paul yesterday and he mentioned that I had errored in stating the head was 28.5 cc. They had cut several heads to the SST 60 spec and they came out at 21 cc. Here is the SST 60 spec sheet and it says 28.5.

http://www.apba-racing.com/sites/all/fi ... nts/60.pdf