Trust what efi-diy is telling you. Last year at Speed Week we converted my carbed 270 GMC to Megasquirt controlled GM TBI in about an hour! Had it not been for a vacuum leak and a fuel line attachment problem we would have been cruzing Wendover! I'm closing in on my 292 project and it is only taking so long because I am learning it all at once, but I am learning it
"I wonder if God created man because he was disappointed in the monkey?" Mark Twain
