It seems to be we have a 1ton 4x4 all buttoned up and it sets just as it did when we took out the small block. I say we my BIL has done the work he is the master mind of the project for his sister. Its just a matter of getting all the little nice things done and she will have a really nice truck. I think that we will park my 04 and use this in the winters of MT it will be nice to have 4x4