Last summer I picked up a low mileage SC400 with a blown head gasket. While I had the engine out, I was overcome with the desire to put a 4.3 back in. After 6 months of scrounging parts, it's in and running. I still need to find an airbox from a 4.3 GS or SC and a gated 5 speed shifter and cluster from a 98-00 SC400, but beyond that, it runs great.

 

whoa!, you got any pics? what car is the motor from?

 

I do have some pics, but I still need to crop most of them. The engine is from a 2001 GS430 w/68k miles. I'll get some pics posted when I get some free time.

 

I have the factory airbox out of my gs430 when I swapped it out with an SRT intake. I was keeping it in storage just in case, but I will sell it for the right price. PM me if you are interested. It's mint.

 

Spdrcr or something like that username did it back in '11. He said the block is exactly the same. Lets see some pics!

 

What had to be done wiring wise?

 

I built a custom harness to extend appropriate cabin signals to the GS's underhood ECU. Sounds way easier than it was. The one difference on the engine block is where the rear of the ps pump mounts to the block. Pretty much everything else was wiring and immobilizer.

 

I've seen the swap in person, it looks great!

 

Wow looking forward to pics haha.

 

I am sure oil pan and oil pump were different too!

Nice swap!

 

Really want to see the swap. Which transmission did you use?

 

ppiiccss!!!

 

I was thinking about doing this swap as well down the line, im very interested in seeing pics

 

The oil pan and pickup tube are '95 parts. The trans is the A650 from the GS. Pics are in process.....

 

Nice swap, I bet it packs a bit more punch than the 1uz. Welcome to CL.