Yes I had to grind the block and the alt casing. It wasn't difficult.. If you take your time and follow the right ups.

Both my DSMs run 1 wire off the pigtail. And the main battery wire. Runs fine for me.

11.45@125,
stock bottom end 6bolt 2g head.
272 hks cams.
Holset hx35
Backyard biult!!