2 Adapting an LS engine to a TH350/TH400 is not only possible, but quite easy to do. Read more to see how with lots of pics!
BBC to LS
2 
Part 9 We make LED dome light from scratch, add a 3rd brake light, and reconfigure the exhaust…again.
5.3 LS ENGINE SWAP INTO OL’ BLUE 1971 CHEVY TRUCK ...
Time to install a new Painless Wiring harness and make a DIY digital dashboard. Also, I get to go on my first test drive with the new LS Motor!
5.3 LS Engine Swap into Ol’ Blue 1971 Chevy Truck ...
1 The project that never ends….continues!! This time we install LS Swap Throttle Cable, Spectre Intake, and create a mount for the LS Engine ECM.
5.3 LS Engine Swap into Ol’ Blue 1971 Chevy Truck ...
Part 6!! Ol’ Blue is alive and well with ‘er new LS Powerplant Swap!!!!!!!! With video!
5.3 LS Engine Swap into Ol’ Blue 1971 Chevy Truck ...
Part 5!! We mount V-band clamps on factory truck LS manifolds and fabricate the exhaust.
5.3 LS Engine Swap into Ol’ Blue 1971 Chevy Truck ...
1 Part 4! I feel like I am finally starting to close the gap on this project! With Part 4 we are going to button up a bunch of small stuff and order a bunch of parts.
5.3 LS Engine Swap into Ol’ Blue 1971 Chevy Truck ...
In part 2 we left off with the motor bolted to the trans waiting for me to build some motor mounts. Time flies because that was almost a month ago! In Part 3 I make the motor mounts, fix the gas tank, and make some EGR blockoff plates.
5.3 LS Engine Swap into Ol’ Blue 1971 Chevy Truck ...
Part 2 of my ’71 Chevy LS engine swap. In this part, I pick up my new engine and stick it where the sun don’t shine (my garage of course…).
5.3 LS Engine Swap into Ol’ Blue 1971 Chevy Truck ...
1 So my very long story short is that I have been having issues with my Big Block Chevy engine ever since I got it. I finally hit the last straw a couple of weeks ago and decided to try my hand at a 5.3 LS swap.