Iím in the process of installing factory Mustang headers on my 85 Tbird. Low budget exhaust upgrade. The headers didnít have the studs( bolts?) that connects from headers to H-pipe collector ( I hope im describing it right) Anyone know what size/length, thread they should be? LMR sells a kit but states itís a little larger than factory so not sure about using them. Any ideas/input. Thank you in advance