I bought the engine without a transmission. Want to buy a 4l60e. I look at my library of books about mounts. Boyd Coddinton's "Hot Rod Engines" shows insulators at either end. The real difference I see is the raised crank centerline. The stock centerline is at the bottom of the block. Pan depth of 8 inches. The 4.2l has an 8 inch pan depth but the crank centerline is 2 3/4 inches higher. Crank centerline will need to higher for ground clearance. I will post pattern when I make part,but that will be a while. Mike
