It's been a while since I posted here, mostly because my two diesel engine swaps have been running flawlesly.
I'm on to the next one and would like to bolt a NV4500 5 speed up to a Isuzu HF1 engine. Does anyone know if this is a standard SAE bolt pattern?

Thanks
Randy

I can't speak for the HF engine, but the B series automotive engines were not SAE pattern, the bolt spacing around the bottom is not consistent where the SAE patterns are.

However the industrial engines do look like SAE, but I don't know anyone who's measured one up.

Randy those are awesome conversions, thanks for letting us see them. That is great advice on your pages too.
"It took way more time (they always do) than I had hoped and way more involved. I would not recommend anyone attempting this unless they have lots of mechanical and electrical experience."

HI RANDY , DOUGAL IS CORRECT THE AUTOMOTIVE VERSION OF THOSE ENGS OR RATHER TRUCK VERSIONS DID NOT USE TH E ASE PATTERN, THE INDUSTRIAL ENGS DID , HOWEVER ON ALLMOST ALL OF THE BELLHOUSING WHERE THE LARGE TRANSMISSION FRONT BELL REGISTERS IN THE BELLHOUSING THE REGISTER DIA IS THE SAME AS AN SAE , ONLY THE BOLT HOLES DONT LINE UP, JUST SET THE BELL IN THERE AND REDRILL THEM, I JUST CRUSHED TWO COMPLETE 4HK1 ENGS THAT WERE BRAND NEW AND COMPLETE ,FOR ISUZU , I ALLMOST CRIED , WHEN THE BIG MAGNET HAMMER CAME DOWN ON THEM ,, THEY WERE THE ORIGINAL PROTO TYPE ENGS AND HAD A LOT OF HAND MADE PARTS ON THEM THAT WERE A ONE OF A KIND AND COULD NOT BE REPLACED , THESE THINGS EVEN HAD THE STARTERS AND ALT AND IONJ PUMPS ON THEM ,ONE WAS A MECHANICAL PUMP AND TH E OTHER WAS THE COMMON RAIL TYPE . ALONG WITH 2 OF THE BIG 6 HK SERIES MOTORS , THE 4 ENGS WEIGHED 4600 LBS AND THER E WAS A LOT OF ALUNINUM THERE . JERRY

I might try and find just the NPR bell housing and adapt it to the NV4500. This is what I did with the Jeep and it worked very well. That way I keep the NPR clutch and release brg and only have to worry about trany input shaft spline mating up to the Isuzu clutch disc.