Guy and Gals, first time poster, here. I have a 99 STS that I want to use the engine out of in my 40 LaSalle Coupe. I've been told I can use a 700R4 out of a S-10 with minor modification to the bellhousing. Other than one of the RWD Cadillac trannies is there anything that would work for this project? I was going to use my 425/400 at first, but got the deal on the wrecked 99 with the Northstar and really would rather go that route. Any help, direction to books or articles that have done this, or just plain old seat of the pants Caddy ingenuity help would be greatly appreciated. I'm also using a front clip from a C4 Corvette and it's suspension, with the rear C4 suspension attached to the stock frame. Thanks!