county 300tdi rebuild

hello,

i wondered if anybody can help me, i have started to strip my 110 300 county i am going to fit a new chassis, i have a td5 110 chassis in almost new condition and i intend to have it galvanized, i would like to know do i need to replace the engine mounts on the 5 chassis or can i fit 5 engine mounts to the 300 block? any help or advice on any part of this job would be great

swap mounts first,shot blasting chassis helps to remove stress added during manufacture to stop it warping