How far can I move the engine forward?

[Keith6987]

I’m just getting started with my power/drive train mock-up on my Blazer 4x4. I don’t have any of the original parts, so I don’t know what stock looks like. I’m going with an NV4500 with a NP241C trans case and a small block. With the engine and transmission crossmembers in the stock position, the trans mount holes are 3 1/4” to the rear of the trans. crossmember. I have heard of people moving the engine forward 2”, but is 3 1/4” too much. I plan on using an electric fan setup. Are there any other clearance issues I’m not anticipating. Also, is a 4 degree tilt to the rear a good number to shoot for? Thanks, Keith