You may want to stack 3/8" worth of washers, or some other temporary shim material. I'm concerned that without the shims the crankshaft pulley may hit the 4" cross-member, and/or the short caddy oil filter (if you are using that instead of the oil filter relocator) will bottom out on the 4" rail.. If not an issue for you, never mind. Its a neat milestone getting the engine in.
Cheers, Dale