I have been giving some thought on trying one of these conversion kits also. I have a 68 vette with the 327, all stock and stock appearing. My goal is to ditch the restrictive heat riser valve. It narrows down to less than 2" ID. I held it open with some wire, but then the choke/fast idle stays on way too long, even in the summer months. I suspect it also contributes to boiling the fuel in the bowl with this new fuel. If I decide to give one a try this year, I'll post the results.