Allows you to bolt a B.O.P. (Buick Olds Pontiac) Powerglide, TH350, TH400 or 700R4 automatic transmission behind a 1955 thru 1963 331, 364 or 390 Cadillac engine.
Includes adaptor, flexplate and hardware. Must be used with starter listed which will need to be modified. Starter sold separately.
Expensive at $700 plus you have to provide the trans, but probably end up cheaper than a Jetaway rebuild.
A 700R4 overdrive would be nice for cruisin at 75mpg on the highway.
Here's the product info and picture
Here's their website
1959 Jetaway trans info - the early year 1959 trans had 15 bolts in the trans pan. Late 1959 into 1960 had 14 bolts in the trans pan.