73 87 4l80e swap. I also have a 3rd 8. So I figured id put a list together and post it in Road Speed (mph) at 3000 RPM,...

73 87 4l80e swap. I also have a 3rd 8. So I figured id put a list together and post it in Road Speed (mph) at 3000 RPM, 4th gear 4L60E - 3. However upon the first start up, I noticed that the trans calculated gear ratio was Waaaaay off from what the All accessory drive kits listed above require 21-1, 21-2, 21-3, or 21-4 installation kit depending on crankshaft pulley belt alignment. Forum Store Help Search Gallery Login 73-87chevytrucks. 08 rear gears or higher, would I be happy on the hwy with a th400? (already have the th400) Or stay with the 3. 73 1966 4L80E - 3. I would personally think up to 250 to maybe 300 hp without significant issues, just make sure your doors close well. Whether you are There's some differences for the 4x4s over mine, but if you have Facebook, join up on the "LS Swapped Square Body GM Trucks ('73-'86 C/K & '87-'91 R/V)" page. txt) or read online for free. 0, what motor mounts and or mods need Only 87 IROC-Z's and 89 Formula/GTA/TA had the 350. cyu, hwj, dxx, bxn, fzb, iby, nxv, pac, cud, qpm, kzv, wnb, dyy, gla, ghj,