Dropping a 454 in 1961 k10

[Lambologo]

I have a 1961 k10 truck with a 235 v6 in it and a 1985 K20 burban with a 454 BB in it. Any one have any advise on how to go about dropping the 454 into the '61? Where to get engine mounts and front cross member? The '61 came with an extra cross member that the previous owner said he was going to use to do a v8 swap but I believe he was going to use a small block. I assume that probably won't work? I'm new to this so any advise is much appreciated