An interesting find. 1977, 1978 only for the BB 400, 440 in the B Vans. Rare.
A Truck motor, It could be 195hp, 301ft lbs torque. The 727 Torqueflite is a plus.
I've only seen one Mopar 400 BB B300 in person, in a '77 Transvan, for sale, $3000, in SoCal, in 2014. Needed a full interior, stripped, but I was moving. LOL. Wouldn't take 2K...
The only 440 I can recall was a black B200 and matching trailer, $9000, for sale in Reno. Around the same time.
Carb work. 2bbl, 4bbl? Stock? Does it have Lean Burn? A Catalytic converter? The cars did by then. Just curious. Be tough to smog in California, I'd wager.
I think Catfish knows more about the Lean Burn. I hear it's not the ideal setup, and is problematic. Smog setup, prior to EFI.
Carry a spare Ballast Resistor, if it ever just cranks and won't fire.
(I knew about this in 1977 for our fleet of Dodge pickups and was a Hero! lol)
The 1990 Chevy G30 Beauville EXT BBC 7.4/400 I ended up with here was offered up for sale in Lubbock at $4000 74K miles, 2016. More dents than rust, but loaded, like your B300. I like yours. I looked for a BB B van for years.
Used car/truck values have skyrocketed up in value lately, until now. But.
Used car values have just reported THE largest drop in value in 30 years.
Seeing Housing do it too. IDK if Y'all notice, things aren't ahh, normal...
So. Value. I have agreed value insurance, of $4000 on the B250, and G30. The B350 Xplorer Class B Van MH is insured agreed value for $10,500. What I paid for it in 2012, at 3T RV, in El Cajon. Asking $13,500
Your B300 is worth $4000 all day long, even a solid $5K IMO. I'd think for mine that would be a decent price. Play Hell trying to get agreed value from an insurance company for that on that, and I know they'll fight me tooth and nail on mine with agreed value, if I ever have a loss. But they're worth it, for sure.
All except for the Xplorer Campervan. Self contained, and fits in a parking space. They sell for $20K plus...
You could do a full quality full camper interior in it, like the Xplorer low top vans, do the bodywork, mechanical, windshield, paint. $20K
Me, I'd keep it for the backup swap meet van, or when that one gets too rusty!
GLWTS
BBC Blue
1990 Chevy G30 L19 7.4 EXT
Church Van, maternity division
DogVan
1988 Dodge B250
LA series 318 Wedge 5.2 TBI A500
Cabin Cruiser
'94 Dodge B350
www.xplorermotorhome.com/Xplorer MH model 230
230 hp LA series 360 Wedge MPI 5.9 A518 OD auto
Old vans are getting pricey!