Houston_t

iTrader: (2)

Was curious if the B.O.P. bellhousing pattern bolts up to the LS engines ?

Houston_t

iTrader: (2)

ok did some more searching and it looks like it wont unless i use an adapter plate, anyone ever used one of these on a ls engine or any other engine ? just trying not to buy another trans at this time and use what i have

i r teh noobz

iTrader: (4)

I see no reason why it can't be done. See what's required to do a BOP to SBC (since SBC to LS is documented), then use that to determine what you need.


I think the LS4 has the BOP pattern for the FWD transmissions.

S10xGN

iTrader: (11)

What trans? I'm using a dual-pattern 200R4 and it bolts right up except for some minor clearance relief grinding for the engine's rear cover.

There are adapters for the Gen I SBC to BOP that should work. The LS4 has the 60° bell pattern and will not work unless you find a trans from a 60° engine, and they are all light-duty.

oldgoat69

The cost of the adapter is a good chuck of the cost of 4L60E or 4L80E.

gofastwclass

iTrader: (2)

You mean one of these from Jegs or Summit? For $50 to $55, it seems like a reasonable budget solution.



On second look, Speedway Motors has them for $40.

bdonn8484

Try J.W Bellhousings. I used one of theirs and its awesome top quality machine work and very happy with my purchase. http://www.jegs.com/p/J-W-Performanc...48597/10002/-1

Gray86hatch

iTrader: (83)

Better off putting a ultra bell on it that will allow it to bolt right on and also is safer and stronger than a stock bell.

Tim

69-chvl

iTrader: (11)

Anybody try one of these adapter plates? Will it work on an LS? Reason I ask is b/c one of the above plates has welded nuts on the back of the plate - will that hit the LS block?

krochus

iTrader: (1)

I'm running a bop th400 behind an aluminum 5.3 I used the jegs adapt-0-plate and if you do it right you end up with more bolts through the transmission than with a Chevy trans. The only issues I had was I had to grind a drilled and tapped boss cast into the rear of the block inside the trans pattern to allow room for the weld nut for one of the top two BOP bellhousing bolts


$40 doesn't get you anywhere towards the cost of a computer controlled OD trans for a carbed LS

69-chvl

iTrader: (11)

thanks krochus!

Are you happy with the way the plate worked out - like does the trans feel attached solidly?

When you say "do it right..." - you mean following the instructions right

krochus

iTrader: (1)

It seems pretty solid. I'm still a few days away from first startup.

Actually "do it right" or just right as I should have said involves welding an extension on the very top of of the adapter plate so you can use the topmost trans bolt hole in the block that is unused on a sbc trans.

69-chvl

iTrader: (11)

Thanks krochus!!!

txcarbuilder

Do any of you guys familiar with the BOP engines know if the bolt pattern on the crank shaft is the same as the SBC? Did the BOP engines change to the one piece rear seal in '86 like the SBC did with the change in the crank bolts too? I make adapters to use Chevy and Ford V8 engines with various Audi and Porsche transmissions and have a customer who wants to use a BOP engine and I am wondering if I can use the dimensions I have for the SBC to make the flywheel for this conversion. I have the information about the difference in the bellhousing bolt pattern so that is taken care of. Any information would be greatly appreciated.

garys 68

iTrader: (1)

Go over to classicoldsmobile.com or realoldspower.com. I'm sure you'll find the specs you need there.

txcarbuilder

Thank you, I will try that and see what I can find out.