Jeep 4.0 in 69 Barracuda

i lost track of the Hemi 265 idea
i have a RHD car with one
and i can confirm tthat the LHD seering box position and the fact that the hemi 6 uses a high starter position would cause problems with any performance headers

you may be able to get away with the single or dual outlet standard cast iron manifolds and some re routeing.... or go out through the fender wall there is more space on the USA drivers side of the car... RHD cars use a US floor pan so we suffer with everything steering and peddle related, on the narrow side....

other option is modified K hemi 265 frame from Elko performance in Oz with a rack and pinion off a US chevy/holden derived GM police car
aussie k frames are A body and will bolt up no probs, its all the same as a 68 dart

when it comes to FI on a hemi 265 DCOE style inlet DCOE style boddies
these injectors should do the job for its 700CC cylinders 6 GENUINE BOSCH 0280155831 1999-2005 VOLVO S80/ XC90 2.8L 2.9L TURBO | eBay

PowerMods ECUs from south africa are cheap
injection pump off a ford truck is cheap
SherryBerg(ali express shop) Jinlin Fajs DCOE boddies are cheap go with the 40 MM
45 will allow the thing to rev to 7000+ but the motors work best 1000-6000
flywheel comes off if you hang about redline 5500 for too long harmonics are a problem in a long engine

you'd need a cam stop
you should pay lots of attention to oil pump.. port it so entrance closes just as exit opens to avoid it trying to compress the oil between the impellor and ring. you can't compress oil so why wear out your pump and drive gears trying to.

No new pumps made in any volume since 1982 its an extinct engine

don't expect more than 40-50fllb oil pressure with 10-15 at ldle when hot
shimming the releif valve will result in the drive coming off or a snapped off pump mount.

great engines but easier in a RHD
designed for your LHD pickup trucks orginally as part of A engine to LA engine project Its a D engine... :)

Dave