Progress on my 340 Hood Scoops!
Howdee....I'm the dude that sells the Mopar hood scoop seals on eBay. The old seals were flimsy pieces that dried out, cracked, and fell out. Mine are a non porus rubber material. The exact size of the factory hood holes is 4 1/8 inches. If you are cloning a 340 hood, don't be too worried about getting the holes exactly 4 1/8 inches since my seals have a very deep groove so anything between 4 inches to 4 3/8 inches is fine. The seals fit very tight and at first, you think they will not fit but you have to work the groove of the seal into the hole in the hood. A little bigger than a 4 inch hole is fine. I usually just cut the holes with a very fine jig saw metal cutting blade so you don't have to buy the expensive hole saw. The jig saw will bounce a lot on the hood so use a very fine blade and go slow. Also, put layers of masking tape down first if you are cutting on a finished painted hood so you don't get scratches. Dart hoods from 1970 to 1972 already have the indentations cut into the braces so its easy to see where the holes go (3/8 inch from the edge of the indentations). The 1 inch diam. holes through the braces are also roughed in and is where the studs on each side must go through so its easy to locate the other studs as already noted earlier. Nothing looks worse than scoops stuck on a Dart hood way out of place. I have attached the pic of my installation instructions below. If you need a set of these seals, get them from my eBay auction which I frequently have on.
Howdee....I'm the dude that sells the Mopar hood scoop seals on eBay. The old seals were flimsy pieces that dried out, cracked, and fell out. Mine are a non porus rubber material. The exact size of the factory hood holes is 4 1/8 inches. If you are cloning a 340 hood, don't be too worried about getting the holes exactly 4 1/8 inches since my seals have a very deep groove so anything between 4 inches to 4 3/8 inches is fine. The seals fit very tight and at first, you think they will not fit but you have to work the groove of the seal into the hole in the hood. A little bigger than a 4 inch hole is fine. I usually just cut the holes with a very fine jig saw metal cutting blade so you don't have to buy the expensive hole saw. The jig saw will bounce a lot on the hood so use a very fine blade and go slow. Also, put layers of masking tape down first if you are cutting on a finished painted hood so you don't get scratches. Dart hoods from 1970 to 1972 already have the indentations cut into the braces so its easy to see where the holes go (3/8 inch from the edge of the indentations). The 1 inch diam. holes through the braces are also roughed in and is where the studs on each side must go through so its easy to locate the other studs as already noted earlier. Nothing looks worse than scoops stuck on a Dart hood way out of place. I have attached the pic of my installation instructions below. If you need a set of these seals, get them from my eBay auction which I frequently have on.