mufflers or no mufflers??
Is that a Performer RPM intake? Those have smaller ports and should be used on a 318 engines. Switching the intake to a better one would help with power. You need to ditch those 273 manifolds, they are killing that motor. I have Hooker Super Comp fenderwall headers and I LOVE THEM!!!! I don't care that I cut my inner fenders, the car is not stock. You can run underchassis TTI's but they are $$$$! I have made some covers for the holes near the headers which keeps road debris out, plus, most people don't even notice mine are fenderwall headers.
Is that a Performer RPM intake? Those have smaller ports and should be used on a 318 engines. Switching the intake to a better one would help with power. You need to ditch those 273 manifolds, they are killing that motor. I have Hooker Super Comp fenderwall headers and I LOVE THEM!!!! I don't care that I cut my inner fenders, the car is not stock. You can run underchassis TTI's but they are $$$$! I have made some covers for the holes near the headers which keeps road debris out, plus, most people don't even notice mine are fenderwall headers.