Adam...no paticular reason for the radiator you had..however the cross flow is an ideal radiator.. i run one of those also with no over heating problems...many do not know of this company but a few guys left "Griffin" radiator and opened up their own Raidiator shop here in the upstate of S.C.....their name is "KARRHOUSE" out of Anderson S.C....they will custom make any radiator for anyone..i have a custom CROSS FLOW MADE with 2 ros of 1.5 inch tubes...for $330.00......
take out your thermostate and take the center of the thermostate out ..this should just leave a flat metal shim with a 3/4 inch hole...
try this 1st..its quick, inexpensive and may just work.....
if it doesn't help enough your going to have to slow the water down by placing a different pulley on the water pump that will slow the water down...
yes i have had some luck with the flex fan's..they are good on a true street car that see's a lot of street driving...keep your electric fan on the car and make sure what ever side you have it mounted on thats its pushing or pulling the right direction.
i think you will find that when you slow the water down you will not need a electric fan.
i have a 511 bbc in a 3,000 lb camaro...i run a CSR water pump and i have an adapter ( see jegs part#555-53087 page 70) that comes off the top radiator outlet that allows me to run a #12 braided line into a #12 fitting that bolts over the waterneck...so you can see how i restrict it..
i can make a full pass and come right back around into stagging for another pass and it never gets above 185 degree's
take a look at ( jeggs part#555-51105 page 71)..this is what the restrictors look like if you bought one instead of making your own..
i have Years of round track experience as a Pit man and garage monkey, we have diagnosed and fixed many overheating problems..,from spiining a water pump to fast to fabricating a high tech shround with vent ducts etc...
i would bet A SHINING PENNY...you place a restrictor in place of your thermostate ...1st.....then 2nd if it doesn't cool it down enough...get a pulley to slow it down..
thanks- Brian
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "