The TM7 is an excellent manifold. When we dynoed my old 446 there were 4 intake manifolds tested ; TM7/Victor/Street Dominator/Performer Rpm

The TM7 vs SD was almost identical...within 1-2 TQ/HP of each other (535hp/540tq) The Victor made 10 more hp but also pushed the peaks up higher. The RPM was down about 25hp but it did make more tq below 3000 than any of the single planes.

My engine combo is very similar to yours although you have better heads than i do....My RPM's flowed right at 300cfm @ .600 valve lift.

I ended up using the Street Dominator with an 850 DP using a 4200 stall & 4.10's the car ran a best of 11.68@116 with a raceweight of 4100 lbs.

Assuming you have enough stall and gear the TM7 will show some nice top end improvement. I would recommend a 1in open spacer for increased plenum volume....mine liked it !



Ron