My inlaws are aging out and they are original owners of a mid 80's ~29' Dolphin with a 20R 4 cylinder engine. RV is in great shape with ~ 80 K miles.
The 4 cyl is so under powered that it struggle to go 60mph on level ground and you know the rest on uphill.
I'm sure someone has replaced the 4 cyl with a V6, I have seen similar Dolphins that were purchased new with a V6.
What is involved in removing the 4 cyl and replacing with a V6.
Thanks in advance,
Ron