Ford recommended adding 6 qts in the STOCK oil pans. Plus about 1 qt more for all frFordesh oil filters.This was because of the potential for high rpms (above 6000), and the large stock oil pump volume, with poor drainback from the heads & lifter chamber. This is for all THREE stock oil pans- all will starve bearings in sharp turns on a stone stock Pantera.
The stock dipstick is fine, mostly. There was a SMALL run of mis-calibrated Pantera dipsticks done in 1971 when Ford/DeTomaso changed the dipstick from an inaccessible front mounted unit to the extended type with brazed spring- (see TSB listings; all done by an outside contractor for Ford. Length specs are mentioned). Most have been fixed in the ensuing 50(!) years.
The 3 possible Ford oil pans for ANY Clevelands are:
1- a plain bucket with NO baffles. Most were on non-performance Clevelands and the 351-M
2- a horizontal baffle in the sump around the oil pump pickup- most Panteras got these
3- a horizontal baffle plus a rudimentary crank scraper on the sloping part of a 351-HO and Boss 351 engines. Note- you CANNOT tell the stock pans apart from the outside. If you believe everything you read, Boss and 351-HO pans were (usually) date stamped on the sump side before painting so there hard to see.