IMM Iron heads on that Mag 318

Not quite the same application, but I had Brian at IMM ship me over a pair of his RHS heads to the UK for my 340. Bearing in mind that the car is a 73 B body Roadrunner with 3.23 gears I'm asking quite a lot of these heads.
Brian told me that I would lose nothing under 3,000 rpm and gain a lot above that.
He was right! These heads are great pieces, more efficient, more compression and I can feels a 'seat of the pants ' gain. Furthermore, I've been using 340 Hi-Po manifolds which certainly restrict the car. The TTI headers showed up this week and I should the feel real gains.
I think these heads are outstanding value and if at the end of the day you don't need them they will still command a decent re-selling price.