Silverwing engine

Hi. I have 3 Honda S600 cars, all of which need an engine or at least an engine rebuild(very expensive and difficult). I found out about these scooters having the same size engine(600cc, yes in a car!) and am trying to find out the length of the engine thru to the rear of the gearbox to see if it it would match as an engine and gearbox retrofit. Anyone one know the measurements. I think it would make a possible great project with minimal engineering requirements on my part compared to a whole drivetrain from another car. Thanks for any help you can offer.

I think first you have to think air cooled vs water cooled.

As I recall S600 as were 360's on Japan market sedans were air cooled. If you are talking about about 600 Sports car they were 4 cy, rear drive.

Think better to work with stock set up, repair with parts that work without lots of re-engineering

I agree with John. I had a 600 in the 70's and it was air cooled. The only mechanical problem I had was with the clutch. Had to do a diy mod to fix the slippage. I can remember having to speed up going down hills just to make it up the next when traveling between Santa Fe and Las Cruces New Mexico.
I would advise rebuilding the existing engines! There used to be some engine interchange sites that may list other easier swaps. Good luck!

Fraid your both wrong. The S600 and S800 were definitely both liquid cooled. Had one in the early 70s but wrote it off in an accident. Uninsured driver.....his fault. Can't help with the dimensions, sorry. I believe a Datsun 1000 eng/drive line was the preferred instal.

disagree-----if you had S600 sedan, just N360 Japanese market with more displacement, twin/air cooled or ?-----if you had the 2 seat sports car, which was available in various displacements, ending at 800cc with reg rear end, instead of enclosed chain drive arrangement---they were water cooled.

The S600 was air cooled. I can remember having to warm the engine 15 minutes in the winter months before trying to drive in the snow.  Even after the warm up, hardly any heat produced by the heater. The car was so narrow that it sometimes would do a 180 because if one tire in the grove, the other side tire would be tracking in the middle of the lane where the snow would be deep.

Let's get this right gents. John G. and Easyrider are correct but I was talking about the S600/800 2-door sports cars only. Anyway, getting a bit off the OP request here.

I believe that John and I already gave our answers. The OP should rebuild the original engine. If he has the know-how to do an engine swap, he should have the know-how to rebuild the original engine.
I think we killed this post and should put it to bed.

Ride safe my fellow riders.