Houston we have a problem !! 340 issue

Car is nice and I guess this issue was what caused the car to be parked for many years , was told old fellow loved this car and he had some nice Original Chrysler stuff
Such as drivetrain from 70 Duster
340
727
8.75 ( 489 ) case Posi
And these odd to me exh manifolds **
Im not sure what these came off of but they are unique.

20190204_205615.jpg

20190203_155549.jpg