I found the single greatest improvement on my 62 and it's overheating issues, was advancing the timing. I fought for quite some time trying all the tricks, some obvious, some not so obvious and only had minimal success. I thought since my timing was spot on, that wasn't a problem. Last year, I decided to fiddle around with advance and total timing and I'll be darned if my car didn't start running nice and cool even on the hottest days. I'm not saying all the other things I tried didn't work, but understanding how big a deal timing is, finally got me running cool. I'll keep my shroud and all the other things, but timing turned out to be king for me.
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