I was planning on fitting the radiator, but I was wondering if you need to mount the radiator in rubbers, or can you just screw it to the chassis. If I don't need the rubber mounts, then why do all production cars have mounted the radiator in rubbers?

I think you've answered your own question

mines not, i have just made some brackets

russ

Ive never seen one(a kit) with rubber mounts!

In the year long gone bye tin top manufacturers never used to use rubber mounts it used to cause a lot of problems with the soldered joint hose stub pipes in the raddiator fatigue cracking.
Problem got worse as vehicles aged also because the rubber rad hoses get rock hard with age.

Use long hoses with lots of flex and rubber mounts.

Mine's not rubber mounted, but hasn't had much use yet.

The Rad is plastic though so the joints shouldn't crack.

Stu