swapping dash clusters

[relentless addiction]

Swapping my tt motor which is almost complete into my 69 Camaro. I haven't bought an ecm yet ill need an ls1b ecm with my 24x crank. but I like the GTO cluster, can I make this work??? I have pin outs for them. I'm just feeling out on how bad of a headache this is gonna be. Im using a powerglide currently, but swapping to a 4l80e.

any suggestions or better ideas appreciated.
thanks,
ben