Help with identifying various holes on '71 340

Hi!
I´m back to working on my dads old car again, its been sitting for a couple of years (got kids, house etc, you know the drill :))
Anyway, the car is a 1968 Dodge Dart GT, imported to Sweden and it´s been sitting in my dads garage since about '91, when he removed the original engine (273), tranny, and some other parts and transfered to a Plymouth Valiant.
The engine that will go into the car is from a '71 Cuda, with 727 transmission, thats been sitting since sometime in the 80´s, and which have also been scavenged for some parts.

I´ve never worked on old american cars, mostly Volvo´s (a lot since you know, Sweden, 740 and winter is always a fun combo) and BMW´s.
Now, the car will have some upgrades like a new tank with electrical fuel pump, HEI D.U.I distributor with built in coil and module, Street Demon carb, electrical fan on aluminum radiator, and some other stuff.
But there are some holes, both threaded and not, that I´m not sure what they are for. Most are probably not important, but I would like to ask you guys if you can help me answer my question so I wont try to start the car and have oil and coolant water all over..

I´m missing quite alot of bolts and nuts that I have to rummage around for, and I have like two pallets of stuff that is supposed to "mostly" be for the car and engine, and also some other cars....

Pic 1:
View attachment 1715968987

Pic 2:
View attachment 1715968988

Pic 3:
View attachment 1715968989

Pic 4:
View attachment 1715968990
Pic 5 (underneath, front to the left side):
View attachment 1715968991

I´m not sure the oil pressure unit is the correct one, and I would also like to purchase a new water temperature unit.
Would these be correct?
Oil pressure unit:
1968 DODGE DART Standard Motor Products PS11T Standard Motor T-Series Oil Pressure Warning Light Sending Units | Summit Racing
Water temp sensor:
TEMPERATURE GAUGE SENDER FOR DODGE PLYMOUTH CHRYSLER | eBay

Also a little worried about the holes in the bottom of the engine..

Thanks!


You can download factory service manuals for free here... Look for the year and make of the car you are looking for...

The wiring diagrams are in the back of chapter 8...

Service Manuals – MyMopar