Not necessarily. I had a 70 stamped 1.9 low comp, hyd lifter engine with an aluminum pan. Although most low comp GT engines came with the steel oil pan. This 652048 aluminum oil pan was also used on 71-73 50 series Opels (Manta,1900,wagon), which would have been low comp 1.9's by then.
I'm hangin' in there. Pretty much been stuck in bed the last 2 weeks. Finally able to get up & about today. Surgery is Oct 31. The 3 DR's that needed to colaborate test results & surgery dates had their vacations set a week after each other. So surgery went from first week of Oct to the last day.
BTW- If this oil pan is used, you will also need the correct length dipstick.
My 71 Opel GT has the original cast aluminum oil pan. The 14X1.5 MM threads in the aluminum pan for the oil drain plug appear to be steel for durability. Is this true or are the threads aluminum material?