I was in Burnet about a month ago, picked up a a school bus at their bus barn and towed it back to the International dealer in San Antonio. Used to go through there at least once a week some years ago. And the tank is a M48 Patton tank. The plane up on the pedestal is a Trainer and the camo "Shark" is a A7 Corsair II and of course being an Artilleryman I'll take a jab at the Howitzer. Looks like an M2A1 but it has coils on the equilibrators like the M114's did. And for some reason (metallurgy technology?) the 105mm guns had thick barrels like the 155mm guns of the day. If you'd have got a shot of the breach block I'd know if it's a 105mm or a 155mm. Rock Arsenal didn't start giving towed Howitzers longer barrels until the M198 era.