Will a 350ci motor be a straight swap for inline 6?

[Neatbeard]

Hi guys.

Dumb question probably, but I currently have a 66 SWB stepper with a hi torque inline 6 and manual 3 on the tree.

Would I be able to take the inline 6 out and fit a 350 in its place with no modifications?

Will it fit the manual 3 speed?
Will it fit the existing motor mounts?
etc etc.

Thanks in advance.

[pimpston65]

Originally Posted by Neatbeard

Hi guys.

Dumb question probably, but I currently have a 66 SWB stepper with a hi torque inline 6 and manual 3 on the tree.

Would I be able to take the inline 6 out and fit a 350 in its place with no modifications?

Will it fit the manual 3 speed?
Will it fit the existing motor mounts?
etc etc.

Thanks in advance.

to my knowledge the back(trans side) on a L-6 (292) will accept all trans forms i.e. auto,manual, so the V-8 will mount up to the same trans forms. the motor mount on the L-6 is very simular, meaning the drivers side is exactly the same on V8, but the pass. side is a bit different and will need to be switch to V8 perch to fit the crossmember. you also will need to switch the clutch pivot ball from L-6 to V8 type... thats all i got. why are you switching, if you dont mind me prying???

[Neatbeard]

Originally Posted by pimpston65

to my knowledge the back(trans side) on a L-6 (292) will accept all trans forms i.e. auto,manual, so the V-8 will mount up to the same trans forms. the motor mount on the L-6 is very simular, meaning the drivers side is exactly the same on V8, but the pass. side is a bit different and will need to be switch to V8 perch to fit the crossmember. you also will need to switch the clutch pivot ball from L-6 to V8 type... thats all i got. why are you switching, if you dont mind me prying???

Cheers for the info. I've always loved V8s and all my mates over here are getting better fuel economy and at the same time are still faster, have better performance, etc. I'm just thinking aloud at the mo.

[Greg63]

I swapped out my 230 L-6 for a 350 V-8 without any real issues.
Both motor mounts bolted right up to the 350 and the trans mated perfectly to the 350. There were no crossmember clearance issues at all.
I am still using my L-6 clutch pivot linkage assembly.
Greg.

[Lugnutz65]

Originally Posted by pimpston65

to my knowledge the back(trans side) on a L-6 (292) will accept all trans forms i.e. auto,manual, so the V-8 will mount up to the same trans forms. the motor mount on the L-6 is very simular, meaning the drivers side is exactly the same on V8, but the pass. side is a bit different and will need to be switch to V8 perch to fit the crossmember. you also will need to switch the clutch pivot ball from L-6 to V8 type... thats all i got. why are you switching, if you dont mind me prying???

Pimpston65 is correct but I will add some info. If you have a 230ci or 250ci then you already have the correct engine perches. If you have the 292, then one of the perches is not correct for the swap and you will need to find one..

The L6 mechanical clutch uses a Zbar that mounts to a bracket that comes off the side of the engine block. Your V8 might not have a place for that bracket to mount, so keep that in mind. As far as the V8 swap goes, it is one of the most common modifications for these trucks and a quick search in the FAQ section or the build thread section should get you the details required for any questions. Good luck. For me, I'm staying with my half dozen.

[Dans66Chevy]

230-250 six has the same mount location as a small block. The 292 is the only odd ball on the motor mounts. Passenger sits forward a few inches. A transmission from a 230 six will bolt up to a 454 they are all the same.

[Neatbeard]

Thanks for the answers guys. I should've said that my motor is a 250 inline 6.