Nice acquisition Tim. I like the GMT Van. Score!
Dyno Dave's GMT thread will provide some insight and inspiration for sure. I had a 97 GMC 1500 with the 350. FI never failed, but a fuel pump did. Fairly close to home, but still, FYI. Also had a worn cap and rotor fail. sidelining the truck. Don't want any of that happening on a trip, dig into those service records! Nice. Good Wrenching!
Iron Chevy Small blocks, and the 4.3 will take a lot of heat, but I'd remedy that cooling issue first. The 3/4 ton GMT should be ideal for your needs. I loved my last GM 350. Don't let that one get hot. My 5.9 has new heads, but the shop obviously didn't do the WP. Had I known, I would've replaced it along with the leaky radiator, back when I was younger in 2014. Did all that in the snow. It's snowing now, and just ain't no way Bro!
I have new radiators in both of the Dodge smallblocks, but they really don't have enough radiator, IMO. I run coolers and fans on the 5.9 B350 Xplorer MH, but it is a Hot Pig with the boat in tow on any kind of grade. I have found custom aluminum radiators for the Dodges, maybe you could for the 350, as well. They are 3 row, increased coolant capacity but are not crossflow. frscke1 has custom aluminum ones in both his BBC G30s.
Here. The 454 Church Van G30 with the BBC cools fine, but has the AC fan modified to run upon start. Factory coolers with the original radiator is all good so far.
Just some Internal combustion observations. Again Super nice Van and Good Wrenching!
"Who New? Blue"
1990 Chevy G30 454 EXT
Church Van, maternity division
1988 Dodge B250
'94 Dodge B350 www.xplorermotorhome.com/
Xplorer MH model 230 230 hp MPI 360 LA Wedgy OD auto
Old vans are getting pricey!