I6 250 to v8 350 conversion questions

[Luke87gt]

Hello, my 1969 c10 (3OTT manual) currently has an i6 250 and I have a 350 small block sitting in my garage. I’ve read about the swap on this forums and have a pretty good idea of what’s involved but would like to ask for your help to eliminate some gaps

First, I understand that the 350 can utilize the i6 engine location, mounts, clutch, flywheel, starter.

a.) although I understand that the i6 trans and flywheel will work, I’ll replace these anyway. Given that, I plan to go with a v8 clutch/flywheel which is slightly larger in diameter if I recall. Wondering if anyone has any recommendation for a good value clutch/flywheel for a v8 that is strong, won’t kill my left leg, and reasonably priced? I actually don’t know the year of my 350, how can I be certain I’m buying the right clutch/flywheel?

b.) I’ve read that the block needs to be drilled and tapped for a clutch pivot ball? Can anyone steer me to a part number or link for this? It would help to know the drill/tap sizes

c.) does anyone have a picture of where the pivot ball needs to be located on the block? I’ve read that it’s self explanatory once the engine is in the car but I will be doing the drilling/tapping with the engine out of the car.

I think these are the last details I need. Thank you in advance!

[67 twins]

No you don't need to drill for the pivot ball. However you do need the correct bracket for the pivot ball and a different Z-bar for use with the SBC

[Getter-Done]

Here is some pictures and info in the Old Thread below.

Link: https://67-72chevytrucks.com/vboard/...+bar+stud+size

[CAMAROBOY68SS]

Originally Posted by 67 twins

No you don't need to drill for the pivot ball. However you do need the correct bracket for the pivot ball and a different Z-bar for use with the SBC

you actually dont need to change the bracket or Z bar if the motor is still set back in the I6 location. Im still running all my I6 stuff on my clutch setup.

With a small block there should already be a threaded hole kind of in the middle between the dipstick and oil filter and the ball screws into that.

[Luke87gt]

Motor will be set back in the i6 location for Porsche 911 F/R weight distribution (jk). But ya, will use the rear positioning which is set back.

My understanding is that you then do need to drill the block but can use all the bar hardware from the i6.

Maybe I can take a pic of what holes are there on my 350 later today.

[Luke87gt]

Originally Posted by CAMAROBOY68SS

you actually dont need to change the bracket or Z bar if the motor is still set back in the I6 location. Im still running all my I6 stuff on my clutch setup.

With a small block there should already be a threaded hole kind of in the middle between the dipstick and oil filter and the ball screws into that.

Interesting, so you never had to drill/tap?

I’ve read multiple posts here of i6 to v8 conversations saying that was necessary (in addition to needing to cut 1/2” from the bar)

[Getter-Done]

There is this bracket if you can find or fabricate one.



Here's a frame bracket.
https://www.ebay.com/itm/28584162943...3ABFBM5KXP5qVl


Here some pictures and possibly a place to buy?

https://4speedconversions-com.3dcart...k_linkage.html

[67 twins]

Originally Posted by Luke87gt

Interesting, so you never had to drill/tap?

I’ve read multiple posts here of i6 to v8 conversations saying that was necessary (in addition to needing to cut 1/2” from the bar)

All I know is the stock setup has a bracket. It does not thread into the block.