Help me out 400 to 307

[72 pontiac catalina]

I have a 1972 pontiac catalina took the 400 out of it now I got a 307 out of a cutless what motor mounts do I need and any info on this will help with the build

 

[565bbchevy]

IMO if you want a wimpy underpowered engine you should look for a Pontiac 301 and it would be a direct swap.
That way when you get tired of being passed by old ladies you can get your 400 rebuilt and reinstall it with no issues.

 

[ck80]

A worn out cutlass 307 probably packs 1/3 the power and torque of the 400 done right.

If you insist on doing it, find the equivalent generation and body style of the Catalina that originally came with a SBO and take those mounts. Then save your originals for when you want to go back.

If you got rid of or destroyed the 400 somehow, find a 455. All poncho v8s were externally the same do get the cubes for that heavy lady

 

[L92 OLDS]

72 Pontiac Catalina ….Why is this a vote?

 

[ck80]

72 Pontiac Catalina ….Why is this a vote?

Probably for the same reason it's being considered as a swap.

 

[L92 OLDS]

 

[Kamloops cutlass]

As someone who has ran a 307 and a 301in a Buick lesabre, I recommend against it
Way underpowered and there is no cool factor in holding up traffic or being afraid to pull onto a busy street in a lazy heap
Just my opinion, it’s free and it’s worth it 🙂

 

[pontiac guy]

I'll buy that 400 from you.

You need different motor mounts. Look at delta 88 for a donor. I'll also buy the Catalina from you because it deserves better than a 307 olds. PM me

 

[buick7332]

Your Catalina will cry if you put an Old's engine in it.

 

[olds307 and 403]

I like the 307 but why would you do this? You need 73 through 90 frame mounts and the same for replacement mounts. A lot of work for 140 or 150 hp and 245 or 255 tq.