dsmith6920

hey, im looking for some info. im putting a 6 liter into my 65 skylark. i have a th400 laying around. i want to know what the conversion is to connect the two. i really appreciate the help. also, is there a good, reasonable, stand alone system to run the engine with out the factory computer? also, any intake other than the L-76 to run? ( i know you have to run the L-92 heads).

busta9876

iTrader: (3)

what year 6.0L?
Is the TH400 the BOP (Buick-Olds-Pontiac) bolt pattern or Chevy? you'll need the chevy bellhousing to work behind the 6.0L.

You should have a flat flex plate, which will let the torque converter pilot rest inside end of the crank or adaptor when the bolt pads touch the flex plate. This is important for proper alignment of everything.

You may have to drill the flex plate for the smaller pattern on the TH400 converter. If you're TH400 has a heavy duty converter with 6 pads, it may line up with out drilling.

Other then that, TH400 bolts up.

Might try a search..i'm sure there is lots of info about TH400 on Gen III's on this forum.

jay_lt4

iTrader: (4)

if your 6.0 has the flat flexplate it will bolt to a th400 with no modification needed, even the th400 converter will work

supreme84

hi ! would it be the same thing for my 700r4 ???? i have a lq4 that was using a 4l60 , would i need the spacer ???

G-Body

iTrader: (4)

If it had a 4l60e behind that LQ4 then you will need a spacer. If it had a 4l80e which it should have, then you will not need a spacer. If the flexplate is flat then it already has the spacer, if its dished it needs the spacer.

kirtondog23

Why do you want to run the engine without the computer? It seams that this would be the easiest way, you of course would need to program out some things but I don't know why you would want to do something different.

Shawn MacAnanny

iTrader: (12)

Jegs sells the BOP-> chevy adapter plates for $56. I have a BOP Th400 that was in my 68 i was going to use behind my LS1

supreme84

G-BODY, i measured the distance between the block ant the end of the flexplate and if i measure from where it's punched 6.0L to the end of the flexplate, it give me 1 and 1/8 inches is it right ??? thanks for the answer