70 hp power head interchangeable?

[Rayintexas]

I have a 1976 70673D and it needs rebuilding or replacing, low compression, and it might have a crack, found a power head from a 70EL76D, question is are the power heads interchangeable?
Anyone have a good power head for sale?

 

[racerone]

Should be the same.

 

[Rayintexas]

Thanks

 

[Rayintexas]

Should be the same.

Any idea if the power head from a 1980 75hp
Model #E75TRLCS would work on the 76? Thanks again

 

[racerone]

will also work.

 

[Rayintexas]

If drive shaft spline is different can i just change drive shaft? Thanks

 

[racerone]

???----The driveshaft spline is the same to 1988 models.----Post #5 tells you that I believe.----Block change was made in 1986 70 hp models at 56 cubic inches.---60 HP model blocks stayed the same to 1988.

 

[Rayintexas]

Thanks I was a little confused as the part number for the drive shaft was different between the 80 and the 76. Mine is a 3 spline

 

[racerone]

A 4 spline !!------It has taken me many years to know what fits what.

 

[Rayintexas]

???----The driveshaft spline is the same to 1988 models.----Post #5 tells you that I believe.----Block change was made in 1986 70 hp models at 56 cubic inches.---60 HP model blocks stayed the same to 1988.

Thanks. Looking at picking that 1980 and rebuilding during the winter as my 1976 is still running but has a couple of weak cylinders. Appreciate the advice

 

[racerone]

Have you counted the splines on yours ?

 

[flyingscott]

I would rebuild a 70 hp before I rebuilt a 75 hp