Dave,

I'm totally convinced, and I know Ron Jones will back me up on this, that the best way to determine firewall accessory locating is done by hanging the engine before installing the firewall blanket and fitting the batteries, power grids, break-out electrical connector ect. Once you are satisfied everything will fit and clear, remove the engine and mount, drill the holes, tape your paper plan on and transfer. At that point you can install the firewall blanket and re-transfer your marks from the plan and make holes from that.

Sounds like a pin in the ass, but I think this will save you a lot of time in the long run from re-locating items as I needed to do after I had the engine on. The plan you get with the kit is merely a guide. Best not to follow that to the letter. Most of us are installing additional items Lancair had not thought of. One thing you may want to consider is a remote oil filter system. I really like mine and it makes oil changes easy.

I hope this helps,
Don Barnes
http://www.lancairlegacy.com/