Here is all the info I have on my springs
The spring part numbers I found are C130508 for the drivers side and C130507 for the passenger side The number for a pair is C130507 PLK
and a different number for what I believe is the same spring is C130503 PLK
I have looked extensively into both numbers as the C130503 PLK are considerably cheaper than the C130507 PLK number but checking the vehicles they are used on (mostly trucks and suburbans etc) they appear to be the same hinge.
These are Chevrolet numbers I was concerned that the C130503 PLK was a smaller hinge or able to carry less load due to the cost difference but I could not find any info to back that up. I went thru Discountautoparts.com and got them for $58.17 for 4 of them.
You have to dig through the site to find the right ones and the prices are all over the place for the same part. If you do a search using just the part number it will save you a ton of hunting.
The best price I could find for the C130507 PLK (a pair of them R/H & L/H) was $94.68 not including shipping.
This is the best info I have on the springs.
After looking into all this stuff I think if a guy really wanted to do the math I bet a pair of scissor type hinges would work even better. they would not protrude as far into the cook chamber as the springs and would be a very clean install the only issue I see would be how much total upward travel you can get most hoods only swing I would guess about 25 degrees and that may not be enough to open your door high enough. You would not need any counterweights or hinges on the outside! That would be very cool in my opinion.