Swapping pre 74 slant six engine to 75 + engine

-
Jim 270

Jim 270

Active Member
Joined
Jan 26, 2019
Messages
38
Reaction score
20
Location
NL, Canada
Hi all I'm wondering what issues I will have swapping a 68 slant six to 75+year engine. I haven't checked the date code for the new engine yet but it was to good to pass on. Reason for changing is I need to do some work on the the original six and take in the season driving the car while I have the original worked on. Any and all info would be greatly appreciated. Thank in advance for any help provided. Jim
 
Jim 270 said:
Hi all I'm wondering what issues I will have swapping a 68 slant six to 75+year engine. I haven't checked the date code for the new engine yet but it was to good to pass on. Reason for changing is I need to do some work on the the original six and take in the season driving the car while I have the original worked on. Any and all info would be greatly appreciated. Thank in advance for any help provided. Jim
Click to expand...
As long as the engine is for sure a 1968 engine you will have no issues at all. Anything that you might need to swap would be on the old engine. If the engine is a 67 or older, you will have an issue. The hole in the end of the crank (for the converter pilot) got larger in 1968 (smaller in 67). If the old engine has the small pilot, you would need to get an adapter bushing to go in the end of the crank of the 1975 engine.
 
Thanks very much for such a speedy response I'm sure of 68. If you can think of anything else please let me know
 
I'm mostly into the "early" "A's" so I'm not sure about the oil pan. The only things I can think of that might be different are
1) oil pan and pick up
2) Motor mounts and/or brackets
3) carb/choke linkage
40 Distributor points/electronic
These are all visible and can all be transfered between engines
 
Thanks I did notice the Linkage difference when I get a better look at it I'll check the rest.
 
The other thing is what are the legal requirements for changing engines in Canada. In some states(US) it is illegal to swap an older engine into a newer car for emissions reasons.
 
Yes new engine definitely has emissions gear on it something I'll look into. I'm planning on rebuilding the original and run the car with the newer engine till that gets done I'm in final stages of cancer treatments and jut want to enjoy it for awhile I have most all parts for the rebuilding just not gettyap to tackle it right now. I'll picking your brains from time to time off and on. Thanks Jim
 
kesteb said:
The other thing is what are the legal requirements for changing engines in Canada. In some states(US) it is illegal to swap an older engine into a newer car for emissions reasons.
Click to expand...
If I understood correctly, he is planning on installing a newer engine in the older car. This should not be an issue. Most juristicions require that the emissions match either the year of vehicle, or year of engine whichever is newer.
 
Sure, but this is Canada. I am not sure how the rules apply. And it is a '68 engine into a '75 vehicle. In California this would be a no no. In Washington, nobody cares anymore.
 
Thanks fellas here ain't going to make a row of beans in a difference done all the time as long as it's done in a road worthy way with all the bits and pieces firmly in place and operational.
 
We're out in the weeds here with imaginary Canadian restrictions on engine swaps.

OP: there is no practical or legal reason you can't drop the later engine into your '68. Just make sure the oil pan is compatible with your car. If it's not the same, just swap the pan and pickup from your '68 engine into the newer one. While the newer engine's out, it will also be a good idea to service the oil pressure relief valve to make sure it's doing its job, as described in these two threads: thread 1, thread 2.

If you want to keep things simple, you can use the '68 carb and distributor.
 
kesteb said:
The other thing is what are the legal requirements for changing engines in Canada. In some states(US) it is illegal to swap an older engine into a newer car for emissions reasons.
Click to expand...
When in actuality there were years of a given engine that there really was no difference in how much an engine (at least the long block portion) of one year vs same model engine of another of another year would mean a damn in emissions output.
Plus if the older engine has less miles, is in better condition, possibly overhauled, or a million other (I'll call them "excuses") the older engine could possibly run cleaner than the one being replaced.
Alot of the emissions crap was just "bolt in" anyway over the years
 
kesteb said:
Sure, but this is Canada. I am not sure how the rules apply. And it is a '68 engine into a '75 vehicle. In California this would be a no no. In Washington, nobody cares anymore.
Click to expand...
I doubt they would check for numbers on an engine to see when it was cast to prove the year of engine vs year of body
 
I'm pretty sure that will be the case here. Last chemotherapy this week 3 radiations next week then I'm free to organize the swap out. If you think of anything else keep it coming slow lately I have time to read up. And Thanks
 
You must log in or register to reply here.
-

Back
Top