i replaced my 0331 head with a 630 head a couple of weeks ago. After being out of town for a week, i finally had enough day light to get the brackets done, and i promised some picutres. My brackets are not as pretty as some of the others i have seen, but they were easy, cheap, and are ROCK SOLID.
I started with some sandard 1/4" 90 degree angle irons and then "opened" them up. The brackets fit onto the 1/4" valve cover studs perfectly. I had to drill a 3/8" hole on one arm between the 'factory holes' for the 5/16" bolt to go through. 'Original' 90 degree bend on top and 'custom' bend on the bottom.
I tried to use the original bolts, but they need an 8mm nut. My lowes had no metric stuff, so i just switched to 5/16". I also bought grade 5 bolts. I didnt use a washer, because the bracket acted as one. Here is the new vs. the old
I also used grade 5 'flared' nuts. This way i didnt have to strugle with a washer on the bottom side.
They went on real easy. Didnt even need a wrench on the bottom nuts, just held them with my fingers, while i ratcheted on top. I'll check them in 100 miles or so to make sure they are still snug. And like i said above, it is rock solid. This rail isnt going anywhere. I used 3 brackets in total. 2 in the back and one near the front.
I got everything at my local lowes. Cost was about $6.
Enjoy the holidays.
ixj
I started with some sandard 1/4" 90 degree angle irons and then "opened" them up. The brackets fit onto the 1/4" valve cover studs perfectly. I had to drill a 3/8" hole on one arm between the 'factory holes' for the 5/16" bolt to go through. 'Original' 90 degree bend on top and 'custom' bend on the bottom.

I tried to use the original bolts, but they need an 8mm nut. My lowes had no metric stuff, so i just switched to 5/16". I also bought grade 5 bolts. I didnt use a washer, because the bracket acted as one. Here is the new vs. the old

I also used grade 5 'flared' nuts. This way i didnt have to strugle with a washer on the bottom side.

They went on real easy. Didnt even need a wrench on the bottom nuts, just held them with my fingers, while i ratcheted on top. I'll check them in 100 miles or so to make sure they are still snug. And like i said above, it is rock solid. This rail isnt going anywhere. I used 3 brackets in total. 2 in the back and one near the front.



I got everything at my local lowes. Cost was about $6.
Enjoy the holidays.
ixj