I am in the process of doing the Kiesler 4L60 swap in a 72 duster.
Mentioning economy will get doe eyes from a hippie, and laughs from an accountant. Rough napkin math showed I would need at least 216 tanks of fuel to break even. That's 3240 gallons.....
I'm doing it because EFI got me addicted to computer control, I want OD, and the 4L60 is the only thing that fits without chopping up a cherry car floor. I've seen them run in blown Denalis and turbo LS cars. They will live if built properly, tuned properly, and driven properly.
Difficulty is Advanced. Abodies such as mine need to have the torsion bar crossmember notched & boxed a little to clear the 4L60 tailshaft housing. It's like notching a K member for a big oil pan, and doesn't even break through the floor. It will require a little MIG welding, whether DIY, borrowed or paid for. Kielser can tell you if the narrower early Abodies are more of a challenge.
The rest of the install is as tough as a normal trans swap, with some plumbing and linkage. The wiring is about as tough as putting in a bunch of gauges.
They have flywheels for all internal balance engines, as well as Magnum 360. External balance strokers will need to balance match the new flywheel like I did.
To get the most out of it, there are tuning elements similar to light EFI. I am lucky (unlucky) enough to know a couple GM guy with powertrain backgrounds. They make life easier, but aren't required. The kit comes with a performance tune already and a warranty.
Tech help from Kiesler is very good. The instructional cds are great. The custom trans mount is flimsy and has gross non-penetrating welds. The rest of the kit is breathtaking and complete down to bolts & oil.
PH
