GMC motorhome 1977 

Worked at an Oldsmobile/GMC dealership 1976/1978 when these were sold new. Fantastic coaches. Several owners immediately switched out the smogged 455's and 403's for 455's out of wrecked 1968/1969/1970 Olds Tornado's. Huge difference in power. Bolt in replacement. Kept the T475 tranny. Helped in the shop doing several of these conversions. These things drive soooo Smoooth!

It does have a 455 built in November 76.

from the outside it looks good; what does the inside look like?

mid