The rear studs come out fine, I’ve swapped them many times. Still have some in use from a swap 30 years ago.
The front studs are a problem re-using old ones.
That is a 1967 or newer due to the small return hose on the side of the can. 1966 and older would have a heater 5/8” hose sized return tube pointing straight up next to the filler neck.
the bracket is for a small block.
here is a 65 Monaco 426 pump.
Gold one from a 1967 Newport 383. This was working and the car was rear ended and totaled. $80
Black one from a 1968 New Yorker 440 and it was not working. So it is a core. The black plastic snout on the rear has the corner broken off of it. See last photo. Free with purchase, or $30 by...
3 speed wiper motor stamped 2926919 date 2188. Clean and nice, no damage, wires not cut. Has the crank arm on the back. still has the plating on it. $95+ shipping for NW USA
A 71 440 HP and a motor home 440 are far apart from value and desireability.
And then we get to the 727 from a motor home, not gonna go in your car without reconfuguring the tailhousing/output shaft.