cadillackeeper wrote:Somehow the motorhome guys are all a little different.Fuel injection and turbos and ... They all have different opinions.Most stay stock olds and carb,some have piped the shaft Through other engine oil pans.
As far as I know the 66/7 Eldo /Toro is different than 68-78.Spline count and size of shafts and hangers and placement.Most desired for the motorhome is the sp/3.21 out of the early cars.
The 66-67 final drive was 3.21:1, recognized by the 10 bolt cover. It had a smaller cross over
shaft, different support brackets on both ends (and the Cad was different from the Olds), and
a different bolt through the support. Those happen to be SWitch Pitch transmission years, a lot
of GMCs got converted to SWP. There is a lot of support for GMCs.
One opinion is, the ideal gearing is an Olds 455, SWP TH425 with a CASPRO POWER DRIVE
chain of 65:57 ratio (instead of 1:1), and a 3.21:1 final drive, for a 3.66:1 overall. I have
seen this move quite well. The last ones had a 403 with standard TH425 and 3.07:1 final dr.
There are all kinds of engine variations out there. 500, 454, diesel, turbo, headers, aluminum
heads. Some have put a huge effort into fuel injection conversion, some good results, some bad.
For the limited mileage usually involved, I wonder if its worth it? Bruce Roe