My brother-in-law used to run a JC Stanley 8 cyl. w/dual mags & 520 gtsio jugs years ago. It was a heck of a motor for a 14' Alumitech. That motor had TWO mags like the ONE I run on my H2AD, which is a dual mag that runs on a single drive resulting in 8 plug wires per mag.
There was no comparison between that 8 cyl. and the standard 8 cyl. gpu with single plug 470 jugs. I remember seeing JC & gang at BS Hill years ago racing those little BADA$$ hill racers with one...man I miss those Sat. nights on BS Hill.
I'm not positive, but I thought the standard 8 cyl. gpu came with (2) four wire mags.
This thread has been "off topic" as you know what, but it has definitely been entertaining.
That boat you were talking about country was George's boat. He is the kids that works with Safari Rick. That boat was damn good and I was impressed with how he ran. He followed us all the way.
You were hauling butt across that field and you had more throttle left but the passengers in the front were for sure a little scared. I had fun and would not trade it for anything in the world. Would love to take another ride like that.
Love you country and no matter what other people say, you are the hero.
No goldhunter, he sold that boat years ago. His kids grew up & moved out so now he runs a little 4 cyl. like me these days. He ran it about 5 yrs though and it was just as dependable as any other airboat we ran with.
Also forgot to mention, he had a Holley 780 on it & turned a 78x40 wood paddle prop. Can't remember the exact rpm's he turned it, but we wouldn't have hung around anything turning less than 2800-2900 in those days...weren't no houses where we ran.
Reviving old threads, the answer is no, they are built in a shop, GTSIO-520 cylinders to fit a gpu machined case, which has no gearbox, or turbocharger, is how it is done, those cylinder heads flow terribly for a carb application as they were designed for forced induction and injection.