Thought I'd share my experience today. I purchased a pair of OER reman hood springs for 2nd Gen Camaro/Firebird to put on my 68, hoping for Liam's success.
Fail.
They don't even come CLOSE to holding my hood up LOL! This did NOT work for me at all...these are EXTREMELY weak springs.
I counted the coils...24 coils on the OER springs, 28 coils on my older factory springs which still hold the hood up fine but droop about 6 to 10 inches. When relaxed, the OER springs are shorter by about 1/2 inch or so, and using calipers the diameter of the wire is 0.26 vs 0.23 for my older springs. Based on all that, I thought for SURE they'd hold stronger. Wrong.
Anywho...before other lemmings might follow off this cliff, be warned this approach this didn't work for me AT ALL. I put the old ones back on with 6 to 10 inch droop and will probably Ebay off these brand new OER's to someone who has a 2nd Gen...
Might try the Volvo spring thing next if I can find a pair, presumably with better success...