I have those velvety, plush conversion van seats for my driver's and passenger.

I want to convert the passenger into a swivel.

My e150 is manufactured 12/95, but it is considered a 96. So I'm assuming I have a 95 base bolt pattern.

I just roughly measured the seat bolt pattern for the seat and is something like 15.5" front and 13" side. I can not find any thing on the net so far with this kind of measurement. Do I have to buy any swivel base and have someone fab a plate?

Also, my seat belt buckle was bolted directly into the floor, so I would probably need an adapter.

Any thoughts on the subject?

 

you have a 96 base bolt pattern (if any different) tooling up for the new model year starts a couple months before the end of the year and any vehicle made on the new tooling is considered the next years, once production starts dimensions such as bolt patterns are frozen till the next years changes.

 

Do you what the stock seat bolt pattern is?

I know aftermarkets are usually the same as the floor bolt pattern, but what is the stock bolt pattern? I am starting to think my seats have a stock bolt pattern even though they seem like after market.

Mine are about 15.5" front and rear and 13" sides.