Posted by Tom @ Snake River [70.36.75.252] on Tuesday, December 30, 2014 at 21:59:07 :
In Reply to: WT500 pic posted by AAA [216.177.180.123] on Tuesday, December 30, 2014 at 09:33:39 :
I would say late 1960's with a 361 cid power plant.
I run quite a few mid 1970's tandems with the 427's. Gas mileage was about 6 mpg.