How I do planning to cut the groove

I thought you would tell me that \:D

I was thinking about a Dremel.

I had the head and the block just from the machine shop and they did milled the head and the block but not much and they charged me big for that.

I´m running out of budged for this project soon.
It already was more than I calculated.

So taking it back to the shop is no option.

I was only thinking because you said the grooves alone improve the engine.

Frank

To old to die young.