I am swapping 2 engines in my 27ft Regal. The original engines were AQ 171c with bell housing Volvo 855610. I am replacing them with 2 - GM 4.3's. I think the new bell housing is Volvo number 3857846 or new number 3807905 to fit the GM 4.3. My question is - Is the 3857846 housing the same length as the 855610? I am trying to fit a new engine bed for the 4.3 and I have not purchased the 3857846 housing yet. Thanks
