Cab mount location

[Dilligaf]

Hi im doing a Chassis swap on my 620 to a 720 Chassis and was wondering what the distance is from front mount - middle and middle - rear? for the 620 is. Would i be able to use the 620 bush's throughout or will i need 720 bottom bush's and 620 top bush's? Cheers in advance.

[DanielC]

Wait for Wayno's reply.  He has done 521 cab on 720 frames.

[datzenmike]

I put 620 cab on 720 frame. It fit without much trouble. The six mounts for the cab were in the same location or close enough to not matter.

[wayno]

I don't know much about the 620 cab, but Dmike in the post above has done that swap.

I suspect it will also depend on what year the 620 cab is.

[datzenmike]

The location of the six mount holes are the same for all reg and KC 620 cabs. You would think they are different but they aren't.

[wayno]

The location of the six mount holes are the same for all reg and KC 620 cabs. You would think they are different but they aren't.

What I was talking about is the cab mount holes on say a 1973 620 with a kingpin front end, verses the 1978 620 with the balljoint frontend, it would not surprise me if disc brake 620 frame wasn't the same as the 720 disc brake frame with the same body mount holes, but the early 620 frame was more like the 521 frame, so it would not surprise me if the 521 cab would  bolt onto the early 620 frame.

The only two 521 body mounts that line up on a 720 frame are the front 2 that are under the radiator, the rest are a few inches off one way or the other, that is why I said it might depend on the year of the 620(kingpin/balljoint).

[datzenmike]

Could be.

 

I can look up the dimentions between the holes. I have a '78 and a '73 FSM.

[lowdatsun620]

The location of the six mount holes are the same for all reg and KC 620 cabs. You would think they are different but they aren't.

Wait, wait, wait... Reg and KC have the same six mounting points? Awesome, I've always thought a KC cab on a reg frame with a front bobbed bed would be cool. Seems all you'd have to do is cut off the front bed mount and bob it.

[Dilligaf]

im putting a king pin on a 720 chassis so will let you know if the earlier ones are different.

[datzenmike]

Wait, wait, wait... Reg and KC have the same six mounting points? Awesome, I've always thought a KC cab on a reg frame with a front bobbed bed would be cool. Seems all you'd have to do is cut off the front bed mount and bob it.

 

The KC simply extends about 10" further back.

 

I checked the body/frame mount hole locations on the '73 and '78 and they are the same.

[Dilligaf]

Cheers for that mike, so i should just be able to use 620 cab mount bush's/rubbers for it then?

[datzenmike]

Sure, 720 rubbers might be close to the same???