727 Rebuild: Some Questions

70runner said

Thx for reply - much appreciated.

I'm leaning toward the hughes 2500 converter. It sounds like the blocker would increase the 1-2 firmness, already increased by the TF-2 kit. OTOH, by softening the 1-2, the spring might counteract the TF-2 effects. Given the 2 choices, seems like using the spring might be the best option if I don't want a harsh 1-2?

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actually the TF-2 doesn't really firm it up a lot if you don't go wild drilling out the hole that controls the 1-2 shift in the transfer plate. I can understand not wanting a harsh shift but with a 2500 stall I doubt it'd be anywhere close to harsh even with a blocker rod. If your worried you can always install the spring and if it doesn't shift firm enough for you take it back apart and install a blocker. That's what I ended up doing. When I first put my car together with a fresh trans. and TF-2 kit installed I had a 2200 stall in it and the 1-2 shift was pretty soft. I replaced the spring with a blocker rod and it's perfect. You can feel it but it's not harsh. Under full throttle it would chirp the tires slightly until I put drag radials on it. Now it just goes.