Hello everyone.
I am in need of some help, please. I am trying to put a 46-54 270cid GMC motor (according to casting numbers) back together in my sprint car. This motor has been heavily hopped up in the past and so is now far from stock.
I have a new gasket set, but the bores are larger than stock (approx 3.15/16"). The head gasket in the kit I have is too small and overhangs the bores. I am worried about hot spots and detonation with the gasket hanging into the top of the bores.
There is a part number on the old gasket (Felpro 7607), but I cannot find any leads on where I can get one from, nor what I can cross reference it with.
Please can any of you experienced guys give me some guidance on this - I am hoping to get to the beach races with the car in May.
I am in the UK, which makes it even more complicated!
Thank you
LT