Little update, yes take off the bottom xmember and If its rusted to hell like mine was the get a rotory wite brush and some acid that ate the metal back to a nice shine then undercoat/paint it and do it silver as it realy makes a differance to the amout you can see under there, also while the rad was out I cleaned up any rust ect as it maybe the only time it will ever be out!
Also I cleaned the rubbers holding the rad and the airbox also used silicone rubber into the gaps in the rubber and its stopped the rattle from the airbox at last!!
Also drilled out and tapped the bolt on the x-member that I broke off and used copper grease on all bolts..... also had to drill out several self tapping screws that the last %&^$ had broken off, also replaced the missing bolt that the last lazy person had not bother to put in holding the fan to the rad, changed the resistor that was broke and then used silicone spray to coat them so they wont corrode and all the wires cleaned and coated, also used silicone rubber to close up the wires to the plugs to stop water getting in there..
the cheap rad was alloy but not alloy finned like most are but had a hard (maybe zink coated steal?) kind of mesh on edge that wont bend and I should think will be easy to clean off the dead bugs with a brush, The rad is must more "alive" with the temps and you can see it move when you floor it up a hill ect but not even on a hot day did it get to realy high temps, It maybe moves +- 5c where the last one did not move.
I put to much anifreeze in so had to drain some out, I think its slightly over 50/50 mix but hey ho, anyway thats It I think.... hope it may help someone someday lol (sorry I like follow up threads