I am putting the unit on a 100xxx mile M20B25 swapped into my '88 320.
I have rebuilt it with new seal, bearings water pump etc., o-ringed the block and welded the water channels in the head. I am using the stock head gasket and arp studs.
I am assembling it together now ( in the evenings after work) so its a bit slow. I want to be running NA on stock injectors by end of January.
Later on I am looking to get a hx35 and piping, 42lb injectors and shoot for ~300rwhp at 1 bar.