Originally Posted By DaytonaTurbo
iagree totally different. 73+ = rubber isolated + different engine mount perches (welded on from factory) for SB and BB.

Originally Posted By shocktrp
No, and if you use an oil pan from a 72 or earlier BB in a 73+ it hits the K-member.
Guess how I know...


Are you using stock BB spool mounts in a SB k-frame? I have to ask because I have a 440 in my car and a generic 440source deep sump pan and it clears totally fine. When I bought my car it had a stock (1976 passenger car) 440 oil pan on it that the last guy had hammer to clear the k-frame because he did not use the proper conversion motor mounts when he put the 440 in where the 318 was. After I put in the conversion mounts from engine-swaps.com everything fit perfectly.


It's a numbers matching 400 so I would assume that it has the correct K-Member & mounts.

From what I can tell I'm supposed to have a "971" pan but what I actually have is the cheap one that Summit says will fit everything;

https://board.moparts.org/ubbthreads/ubbthreads.php/topics/54792/oil-pan-with-stamping-971.html