I and going to install my LQ4 gen 3 6.0 liter into my 1970 C10. My C10 already has the 4 speed on the floor. I want to retain the original transmission. I recall my 4 speed is a SM465 on the floor.
- My question can I use the current GM 250 inline 6 bellhousing to just bolt to the LQ4 LS 6.0 liter?
I am keeping the mechanical clutch as well I have the corvette clutch pivot point plate to get it volt to the LS engine the z bar is different on the 250 VS LS 6.0.
I see this as also using SM465 transmission and saving money Vs the T56 which are ridiculous on the price.
Thanks for and suggestions
Joseph
1970 Chevrolet C10 SWB 4 speed on the floor.
I'm not sure the inline 6 bellhousing pattern matches up with the SBC pattern, but I do know I bolted an SBC HM290 up to a 4.8 using a combination of off the shelf GM parts. The SBC pressure plate and clutch disc went right on to the LQ4 flywheel after I opened up the bolt holes in the pressure plate to accept the larger bolts. I found a pilot bearing that fits the LS crank and the HM290 input shaft as well.
Basically you might have to find an SBC bellhousing and measure your input shaft pilot OD to find the right bearing and then check to make sure the height of your throwout bearing is right, if those check out things should just bolt up.
Edit: give me a second and I'll check my records for the part numbers I used, if nothing else they might be a usable reference point.
Ok the laptop with those files isn't want to boot up. Guess that's why I retired it.
I did however google and find this.
General theme seems to be get the right flywheel and pilot bearing and then use the SBC clutch setup.
Straight 6 bellhousing should be the same bolt pattern as SBC so with the flywheel/clutch advise above you should be good to go. Might have to modify the z bar - we had to cut about an inch off the '68 C10 that we swapped a 292 out with a 350.
J22rod
New Reader
8/16/20 2:53 p.m.
I have order this clutch pivot bracket already, I have measured it to my z bar and they do line up.
So a new flex plate and pilot bearing as mention I can swap my LS LQ4 engine.
Let me know if anyone has any other information?
Be aware that LS and earlier I6/V8s used a different bellhousing depth. LS is deeper I believe. This is why you can't just bolt up an LT1 T56 to an LS engine. Input shafts, bellhousing depths, etc are all different.
In reply to Curtis73 (Forum Supporter) :
It's known that the LT trans doesn't work with an LS but for some reason Gen1 stuff seems to work well with the LS using that NFW1050 flywheel. Also worth noting that the really early LQ4s had the same crank offset as the Gen1 SBCs so the 1050 flywheel won't work. I believe those engines also had iron heads though.
