More diff cover

After soda-blasting and soaking in Simply Green for 24hrs:

With self-etching primer:

It would have been nice to clear-coat the aluminum, for a "raw" look, but the cover had too many nicks and dings in it.

Final result:

Bad oil pressure sending unit & new diff cover

I had some (low) oil pressure drama last week: the pressure would climb to 15psi, stick there and then drop to nearly zero. After changing the oil and a lot of head scratching, I fiddled with the oil pressure sender unit and the gauge started registering normal (35-40psi) numbers. Then, of course, it stopped working again - so I ordered a new sender unit from Dave Bean.

I finally found a Lotus differential cover! One of the local Lotus club members had one and graciously sold it to me. It will be perfect for the 3.55 diff swap.

Before cleaning: