[Morris]

I’d call ARP and have your grip length and over all length, talk to them.....

Also inquire about the special washer that goes under the NAS624 bolt....it has a radius under the head of the bolt..and the washer has a radius to match the NAS bolt.......unlike normal bolts

We also found that the washers on our setup was compressing when we torqued them.....we then went to the NAS washer and that fixed our issue of bolts loosing torque....