LT1 Regal

1- Is the Vortec 6.0 (non SS/escalade version) a viable alternative to the Ls1? Performance upgradibility wise?

2- If the donor engine came from a 4x4 truck, can you still use the transmission in a car? If not can it bolt to the 2004R? Will the 4l80e even fit into the g-body chassis?

3- What all is required to mount this engine/transmission combo in a late 80's G-car? Car in question is a 1987 Monte Carlo LS (SB305/2004R/3.73)


4. Wiring is no issue, but what about stock accessory mounts from the 6.0; will they interfere with anything?

Any help with this matter would be greatly appreciated.

Jason H. Rea

I'd think Jonh B and his website
http://home.earthlink.net/~bzdel/index1.htm
could answer just about any question you got, considering the 6.0L and the LS1 are so simular.

If a 6.0L is going into a car, the first two things I can think of that might need to be changed or at least addressed, is the height of a 6.0L intake, and the deep oil pan of the 6.0L.

But I imagine it won't be long before John B, or one of the several others that have dropped a LS1 based motor in a Monti or Camino, pops on here.

5.3 racer

iTrader: (8)

1. yes, definitely a viable (and cheaper) alternative.
2. if you're using the newer 6.0 with the shorter crank flange you'll need the gm crank spacer and corresponding longer flexplate bolts to bolt-up the 200-r4 converter.
3. you'll need an f-body oil pan and custom engine mounts. depending on whose mounts you use you may or may not need to modify your oil pan.
4. stock truck a/c brackets did not work for me. everything else fit fine. the stock truck intake fit underneath my hood but the "vortec" engine cover did not clear.
if possible i would highly recommend getting a donor front frame section including trans crossmember for mock-up purposes, it made things alot easier for me.

LT1 Regal

Great. I would like to use a 200-4R anyway...
The 4L80E just looks heavy.

Whose motor mounts do you think I should use? I want it to sit in like a Gen 1 SBC.... I dont care about a/c...
Where could I get the crank spacer?

I appreciate all of the help.
thx.

ls1_chevelle

iTrader: (9)

.....and strong.

-Matt

LT1 Regal

Is it strong enough to warrant the extra weight?
Also, will it even fit in that chassis? The 2004R Looks alot smaller.

5.3 racer

iTrader: (8)

crank spacer is available from gm part # 12563532 and the bolts are part # 12563533(you'll need 6). all together about $50. i made my own mounts based on where my 307/455 olds motor and th200/th350 were located. my pan did not need modified. i have roughly 1/2" clearance with the front frame crossmember. most other mounts i have seen move the engine forward requiring modified pan or modified crossmember. i wouldn't expect a stock 200-r4 to live long behind an ls1 unless you're starting out with a mcss, hurst olds or gn version, even then you're on borrowed time without some upgrades.

John B

iTrader: (10)

The mounts that I manufacture place the motor within 5/8" of the original SBC location and at the exact same height enabling you to use the stock trans crossmember if you desire or using a dual exhaust crossmember from G-Force. My mounts sell for $150 + $12 shipping and you'll need to modify your oil pan to clear the front engine crossmember. I sell these for $250/exchange (I need an F-body core) plus $30 shipping. PM or e-mail me if interested.