8Mike9

I have an LT1 I’d like to go carb’ed with.

Thanks

tbakertrucks

I did this, got tired of the junk opti. I used gmpp intake and holley 750 vac secondary and skip white billet distributor 8mm wires and autolite copper plus plugs. Was a fantastic combo. On the holley i added 50 cc accelerator pump kit and also added the secondary metering block and adjustable vacum can for the secondaries. Take time tuning carb but it ended up way better than any opti crap i tried.

83 Crossfire TA

iTrader: (2)

LOL, I solved both problems:
- the opti- swapped LT1 heads onto a SBC 305 😁
- I used an old victor jr intake on that, welded everything shut that didn't line up and then put new holes where I needed them

There used to be a GMPP intake manifold that had the LT1 pattern and was intended for running a carb on them but good luck in finding one 20some years later...

vorteciroc

I usually turn people away from using the Gen-2 SBC (not to be confused with the SB2)...

However, If someone has to use a Gen-2 SBC, I always omit the Opti-Spark for a MSD "Front-Mount Distributor" instead.
Expensive, but worth it:



The assembly mounts to the front of the Engine, similar to the Gen-3/ -4 Engine, in the Image Below:


The Distributor is driven by a Belt off of the Timing-Set, which would be converted to belt-drive as well:

Winter774#

i have a 1970 350 LT1 375 hp z28 engine i am having trouble with the new mini starter gm/Delco it,s grinding the **** out of my fly whee. i tried a eBay mini starter it worked 1 time a broke ha so i spent the money for a decent one and it wont work right i tried less shims more shims the more i try to fix it the worst it gets have a brand new 85 pound original starter i will put it in tomorrow see if that works i do have 11-1 compression so it pretty hard to turn over especially when it gets heat soaked gm rite. Any thoughts Larry B

vorteciroc

This Thread is about the second generation Small Block Chevrolet Engine LT1...
Not the original LT1 (first generation Small Block Chevrolet Engine).