Is a Toto Drake ST743 1.6 G-max tank compatible with Toto Vespin Model #CST764S bowl?

[diytryguy]

My Vespin Tank #ST707S 1.6 G-Max is leaking from a hairline crack and an exact replacement is hard to find. I can find tanks for the Drake, model# ST743 1.6 G-max, but I am not able tell if the bolt holes, drain hole and mating surface will match with my Vespin bowl.
Does anyone know if Drake tank #ST743 will fit my Vespin bowl Model #CST764S ?
Thank you!

https://terrylove.com/pdf/CST764SG.pdf

 

[Terry]

What are the center to center measurements on the two bolt holes in the tank?

 

[Sponsor]

 

[diytryguy]

What are the center to center measurements on the two bolt holes in the tank?

8.25 inches

 

[Terry]

The ST743 tanks look to space the bolts at 8.25"
How about the fill valve location on the 707?

 

[diytryguy]

They look very close accounting for camera angles. Fill looks about 1.5" from bolt.

 

[Terry]

I'm guessing it will work.

 

[diytryguy]

Thank you for quickly getting those measurements for me!
I've ordered a Drake tank and will report back once I get it installed.

 

[diytryguy]

Update, It worked! The Drake tank #ST743 1.6 tank is installed and working great on our Vespin bowl Model #CST764S 1.6 G-Max.
Thanks again Terry.