That makes more sense, although the RPM on the upshift may plummet more due to vehicle weight and profile, it should be fairly close to your calc.

Since the Getrag is for the LA engine, I also figure you're going to use an LA flywheel and egg out one hole so it all fits up correctly, although it's too bad you can't just use an adaptor on the NP bellhousing and keep the bigger clutch and swap fewer parts.

I'll keep watching this one, take pics so you can add an article once it's all in and shook down.

Since the Getrag is for the LA engine, I also figure you're going to use an LA flywheel and egg out one hole so it all fits up correctly, although it's too bad you can't just use an adaptor on the NP bellhousing and keep the bigger clutch and swap fewer parts.

Just wanted to make sure you had the right flywheel, up through the early 80's some of the NP equipped trucks could still get the other flywheel and direct drive starter which will not be compatible with the setup.