Hey guys, its getting about that time for me to fire up the Opel.

All I have left to do is have some headers made. My question is what fuel do I need to run, The engine is a 418 18degree SBC with 13:8 to 1 CR. I know that I can get 110 (purple colored) pretty close by. I was informed that I needed 112 but wanted to double check. Also is C12 the same as 112? If I need 112, could it be possible to mix 110 and 112. The reason I ask is the place I called about getting 112 said that is was $65 for 5 gallons. That seems a little high to me. Sorry about all the questions. Thanks in advance.
Chris