Hi Cliff, I live in the UK, but I've yet to get close up to the LRDG Chev that you pictured.
Here is a pic of my truck.
A guy who knows more about GMC's than me reckons the Chev's cab is the same as a GMC one (?). Thus I thought that the GMC open cab cowl would fit. The rear bed is GMC but is obviously not original. The axles are not the same as the LRDG Chev (are they common to other vehicles?) the wheel base is too long and its a left hooker. Apart from that its a runner and the bodywork is in excellent condition!