Randy,
Yes the spider is located first.
Ian,
Thank you.
Yes I have both alloy radiator and heads.
I'm not worried about "electrolisis" though.
TSC has been continually developing the car for 19 years now. If it was a significant issue it would be set up differently.
I do understand your concern, however by using distilled water and high quality ethlyene glycol, it is a non issue.
American "Muscle Cars" have run alloy heads with copper/brass radiators for decades with no problems.
Regards,
S