Hood hinge modification, anyone try this?

[MI_Custumz]

Saw at a car show a 72 MC with a bolt through the hinge. It was near the front pivot portion (if that makes sense) and through both portions of the hinge. I didn't take any pictures so I'm not sure how to describe it. I asked why it was there and he said he had issues with the hood staying up. It was a cowl induction hood and the springs weren't always holding it up. Has anyone done something like this? If so, would it be best to do it on both sides, how big of a bolt(or other device), and will it mess with the integrity of the hinge over long term use? I currently use a prop rod and was thinking this may be a way to go so when working under the hood or someone sticking their head under it, it's secure. 

[Blackhawk]

If the hood won't stay up then the hinges probably need to be rebuilt, my steel cowl hood can stay partially open for months.

[Dtret]

I’m guessing that the hinges were drilled and the bolt is removed when shutting the hood. I think that would definitely hurt the integrity of the hinge. Rebuild or put on new springs. 

[cbolt]

I have rebuilt hinges but always use a prop rod (Lisle brand telescopic) when working under the hood for safety. My hood stays open just fine, but there will come a day when it won't and I don't want to be under it when it comes down. 

HoodHingeRepair.com – Classic and muscle car hood hinges repaired to better than factory original

This is the company I used. Very satisfied with the results

[MI_Custumz]

They are fairly new hinges and came with springs installed from a reputable place. Don't want to name it out in the open, but was told they were for a MC and not Chevelle. I do have 26 coils on it now and have the 28 coils sitting on a shelf. I'm afraid of putting the 28 coils on and having the hood buckle. I'm just probably paranoid. I would rather use a prop rod vs a buckled hood. 

[stangeba]

A neighbor gave me two small springs that fit inside of the current springs. He had 4 small S shaped pieces of metal that attach, like a hook, to both the small springs and the inside of the stock springs. They have worked well for about 10 years now. I do also use a copper pipe at times with rubber ends to ensure safety when windy but it's a bit too short and one time the hood blew open, allowing the pipe to fall chipping the paint on the top of the fender. I need a larger pipe! (Or keep the hood shut)

[Scott S.]

Maybe a short brace that fits into the hinge when open. 

That way they can fit in your tool box.  

[cbolt]

Lisle Tools 46170: Hood Prop With Support - JEGS

Fits right in the old toolbox. Of course I got mine at the local auto parts store and it was substantially cheaper. 

[MI_Custumz]

I have a 3/4" dowel rod with rubber ends on it for a prop now. I keep one in the trunk and one in front of the car in the garage. But would be nice to keep the hood up like it's supposed to be.

[Scott S.]

I was thinking of something about 10"-12" long that fit in between the arms of the hinge.