In '96 I bought my '71 M code. It had an Accelerator on it and it didn't perform worth a hoot below 3200 rpm. Those engines were like switches and those large ports didn't help low rpm vacuum signal and torque even with the little CJ cam. There was a Superford intake test back in the '90's that compared many of the intakes available at the time. The Accelerator was lazy down low. The best for light to light street ability were the dual planes and the Blue Thunder was the top dog nearly matching the performance of the best track performer, the Holley Strip Dominator. Consider very carefully what you want your mild off the line, in traffic throttle feel to be pleasurable. I yanked my X celerator and sold it. Even the stock Ford intake keeps up with the X celerator up to 5000 rpm for hp. As you can see, the torque of the X celerator is extremely unsatisfying. The Blue Thunder and the Edelbrock Torker well surpass the X celerator. For the money, the factory Ford intake on a streetlight performer is the best priced intake you can get at about 1/10 the cost of the Blue Thunder.
If you have power brakes, remember to give consideration to the vacuum signal to the brake booster.