Long Range Tanks?

[jimmuse]

I am getting ready to buy a '75 337G.

The current owner has told me that the airplane has standard range tanks (93 gal), but all of the indications I have found (POH, Weight and Balance) are that it has long range (888 lbs or 148 gal).

Is there any way to tell without opening the wing?

Could the inboard component of the long range system have been removed at some time?

I have not looked at the logs, which I will do, but I am just curious.

Thanks

Jim