I've done this mod twice now...once with lmc bolts and tall nuts and once with dorman bolts and short nuts.
Her is the install on my 65 with the short nuts/dorman bolts. I managed to get everyting torqed to about 90 ft lbs but it takes a bit of dimpling of the crossmemeber as discussed in the attached thread. (It was easier to use a socket with the LMC bolts/tall nuts...but the Dorman bolts with short nuts are a bit better in the fit and finish department,,,,not to mention about 2/3s cheeper than the LMC parts)
Overall, a great safety upgrade for these old trucks, I highly recommend it. Just watch out for them suspenison springs, ther're mean if ya let em get loose while yer under the control arm!
http://67-72chevytrucks.com/vboard/s...d.php?t=599576