I have a couple of the Time Machine kits. What I am looking to do is to convert the Time Machine Cyclone Spoiler II into a "standard" W-nose Cyclone and need the front bumper from something like the old JnJ resin kit (I have one of these) or the newer Barton kit, which is the one shown in Andy Kellock's article in Model Cars. The front bumper in the Barton kit looks pretty good in pictures. There is one on eBay currently.
Modelhaus hood will fit the Model King body. Missing Link sells stock Cyclone dashes. Also, Missing Link sells a resin cast 70 or 71 Cyclone conversion kit for use with the Revell 71 Torino. (I didn't realize this thread was so ancient. I stumbled across it with a forum search.)
The proprietor of Speed City goes to great lengths to make sure the products he creates are correct. I have one of these bodies and it looks fantastic. Look at his website and see what he has done to make a correct altered-wheelbase 65 GTO hardtop. We are hoping he makes a stock body 65 GTO based on what he has done.