What modern inline engine would you put in a TR6?

[BWA]

That jeep motor sounds like it has great potential.
If one was fitted with that aluminum head, decent headers, a mild cam, and maybe 3 Mikunni carbs I am sure you could get about 270 hp out of the engine. The thing would have lots of torque.
To fit one in the TR6 would still be a fair amount of work.  
The intake and exhaust on the Jeep engine are on the opposite side of the engine so you would have to route the headers around the steering shaft.
The TR6 engine from the center of the crankshaft to the top of the valve cover is 15.5".  The extra 2.5" on the Jeep engine could prove to be a bit of a problem to get it to fit under the hood.
The TR6 engine from behind the fan to the edge of the bell housing is 29".
To get the Jeep engine to fit under the hood you would probably have to cut out the battery tray and shove the engine as far back as possible.

Cheers
Byron

[v869tr6]

Just a quick update on the RB25DE install.
Engine is sitting on mounts, the drivers side is using the stock Nissan mount and is sitting on a 2" by 2" square tube with a 1/4" thick top. The tube is tied into the back of the rear a-arm mount.
The passenger side is the same but I shortened up the stock mount a inch or so.
Had to cut away part of the cross member at the rear, about a inch off the top and a inch off the rear.
Shortened the battery tray and hacked off part of the passenger side.
The stock exhaust, cast header is going to be a issue down between the engine in the gas peddle area, but only about 1/2 "
I set the engine and transmission over about a 1/4" to the passenger side to help with the exhaust.
Cut the front pulley off the balancer so I could keep the engine farther forward.
My engine is a RB25DE and is normally aspirated, the RB25DET turbo engine gets a different trans. and would be the one to use as far as shifter position go's, but it is wider.
Time to build the trans. mount.

[mgbreis]

Bill Young was working on an mga with a 4.0, I think I maybe only ever saw one picture of it. But it seems like a good option for a straight 6!

[Dan B]

Here is a look at what our Lumberjack had been working on:
http://forum.britishv8.org/read.php?13,6370

[88v8]

Not a TR, but this shows what can be done with a modern drivetrain if one doesn't mind pretty much obliterating the original car.
http://bringatrailer.com/2015/08/19/turbo-bmw-v8-skyline-gt-r-drivetrain-750-hp-volvo-amazon/

Oops, it's a V8.
Oh well.

Ivor