[DanEC]

Pretty sure BT mean Blue Thunder. I agree the torque spec from the head manufacturer should take precedence over the intake spec. I would probably take into consideration the length of the bolts and the length of threaded engagement in the head is a key factor. Also, I assume these are a fine thread bolt but if a coarse thread then the spec would be a little lower. Considering all the comments above I would try to get to around 20 as you originally stated. If you have a vacuum leak at that spec another 5 lb ft torque probably wouldn't cure it for long anyway.