Can anyone please tell me if the 364cui nailhead is the same as the 401 and 425cui in regards to the head bolt length and diameter.Will a ARP head bolt kit for a 401-425 fit a 364cui.Also I see on ebay a company called (alloyboltz) advertizing grade 8 bolt kits for 401-425 and was wondering if anyone has had any good experiences with these bolts and are they good for head bolts.