I took the 405 I picked up on here recently down to Mt Gambier for a try at Rallycross at the challenging SEAC Park track. It was a try out for the car, totally stock with compression down to 73 lbs on one of the cylinders, but seemed to go as well as any other Mi16 I've driven. Also a try out for the tow car, a 504 wagon which I've been resurrecting over the past couple of months and a new trailer, just big enough for a 405. Apart from some minor issues with the tow car and the trailer all went well.
The 405 went very well, great handling and power wasn't an issue, I just needed some more confidence off the start you had to dice for the lead down a tricky hill, once you got behind you had to follow for the rest of the run as we were pretty evenly matched except for the wet run where my tyres were hopeless and I fell further and further behind. I'll be entering Winton next month with a lot of weight taken out of the car. I was going to fit a gun engine with my stroker crank in an XU10 block and my special parts from the 309 but it seems that a lot more work is required to fit the crank into that block. As I said power wasn't an issue even with the worn out stock engine, so another one like I now have in the 309, stock but with higher compression, GTi6 manifold and Megasquirt will do the job. So I have a special head with Piper cams, solid lifters all set up ready to go, Jenveys, Wossner pistons 83.5 mm with liners sized to match if anyone is after some bits. Also the stroker crank, made by Auscrank to fit XU7 block.