I have the 347 kit from coast high performance and love it. I was not too happy with some things that happened but I love the kit.
Getting the block notched for the extra clearance needed only set me back an extra $60.
Also the probe kit is supposed to be good for 100,000+ miles according to coast high; they say because of the off set wrist pin the pistons don't rock in the cylinders.
I don't know how much of that is true but they do have one of the best kits out there.
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James Cox
nochevy@hotmail.com
1991 Mustang LX