Members,
I found in Craigslist (San Francisco Bay area) in Napa County, a 305 V-6 with a NP435 Transmission selling for $500.00, posted on Oct. 15.
In Fremont, CA., also in the Craiglist, there's a post under "Chevy Truck" but he has many parts as his pictures show on his post. Only operates by phone calls, no text or e-mail.
I was also looking for other parts when I came across two fairly large dismantlers, one in South Sioux City, Nebraska called C & H Truck Parts,
www.candhtruck.com. They have many of the GMC two-ton and larger trucks but quite a few have 305 engines. Stock number 6552, '68 3/4 ton, stock number 6575, '68 3500, mainly front cabs. Check it out.
The other dismantler is L & L Classic Auto out of Wendell, Idaho.
www.llclassicauto.com. More cars but truck parts as well. A great website.
Best of Luck,
ItalOso - Tom