[Ian Fawbert]

Hi Max,

Yep, sounds like you do have a GPA engine.

I am 99.9% sure that if an original GPA engine, then these numbers (GPA 9393) will be stamped on the oval pad near the oil filter bracket and that the block will be a GPW block with the 6015 casting number on the bottom (under the genny/starter). I havent paid much attention to GPA stamped blocks as i havent needed to.

Check and post the casting numbers of the block and then it can be ascertained whether it is infact an opriginal GPA block. Or better still/also post a pic of the serial number stamping.

Hope this helped,

PS, i`m looking for engine MB 133550 if you have any others!

Cheers,
Ian.