My head choice dilema...

[RobertD]

So we had a discussion about heads...GT-40's and 40Ps. I had narrowed down my choices between these two. I got a couple of replies for TW heads.

The Edelbrocks and cast iron varieties seem to be the heads of choice with AOD owners. The TW w/5 speeds. I had originally thought the P's would help me retain some low end so that my car didn't feel so sluggish out on the streets. The smaller valves created more velocity down low and it would help me retain torque. I looked at the numbers and the Edelbrocks flow about the same as P's up to about .3 lift. After this, it's all Edelbrock. The TW out flow both all over the board, but have larger valves. I don't want a race engine, but a nice running 5-liter with plenty of pull and some good HP (Say...320+ HP). The setup will be:

.030 over block
Cobra intake
Mild cam (depending on head choice)
***Heads of choice***
24 lb injectors
190-lph fuel pump
76 m mass air
65 mm TB
3.27 rear
Off road exhaust, 2 chamber flows
AOD w/ Transgo shift kit

All in a full weight 91 GT. I want the car to be streetable, reliable and, again, not be sluggish down under. That is why I decided on the P's. The Edelbrocks flow the same amount of air on the intake(total from .1 to .5 lift), but are 40 lbs lighter and flow more exhaust! I don't have the cash or time to re-do this combo twice. I need to get it right the first time. You have steered me right before, and I trust your judgement.

I have done so much reading and studying that it's driving me mad. I need to hear more experiences...


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Robert
91GT; 88 ASC McLaren #709