68 Hemi GTS....What size cam you running? Also the SR has the same Raised port intake (better short side) than a standard 906. That's no doubt a great combination in a low deck 511.

Again, nothing wrong with the TF 240 906 port heads, probably an ideal big torque 500" head...Just saying there might be something 'less ideal' (IMO) when you (have to by the given combo choices) combine it with only a 236@.050 Intake lobe hydraulic cam and a 4.25" stroke at ~10.5:1. Something like a single pattern 246@050 with that combo would I think work a lot better, especially above 4500rpm...and it would not lose any appreciable torque down low. I'm assuming that's a 6.535" rod combo? All the more reason the big -1's wouldn't have any problem at all making wheaties downstairs with that small-ish cam in an either/or situation.