The headers you need are Tubular automotive headers : For 2 barrel heads use part# ES 7 with 1 3/4 tubes . For 4 barrel heads use part# ES 7A with 1 7/8 tubes. Both use 3 1/2" collectors. They are sold by Mustangs Unlimited www.mustangsunlimited.com When putting a 351 c in a Maverick and using these headers you CANNOT use the factory V-8 bolt in crossmember that mounts below and behind the motor mounts... Simply unbolt it ,and leave it off.