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motor mounts

 
timmy77prix timmy77prix
New User | Posts: 9 | Joined: 08/09
Posted: 08/16/09
01:42 PM

Can anyone tell me where to get the plate that bolts to the block of a pontiac 400. Someone tried to fabricate some because the car previously had a 301. I have the motor mounts but need the mounting plate. Will i have to go to a junk yard. Its hard to find 400s anymore. Any thoughts?  

65pmdgto1 65pmdgto1
Enthusiast | Posts: 504 | Joined: 12/07
Posted: 08/16/09
08:49 PM

I think Ames and Performance Years both sell what you are looking for.  

Puddles Puddles
New User | Posts: 2 | Joined: 08/09
Posted: 08/17/09
03:48 PM

You can try classic industries to.  It depends on your application also.  I converted my 69 Firebird from a 6 to a 400.  The 400 was a 70 block so I did not need the plates.  So depending on the year of the block and the year of the vehical you may not need them.  

timmy77prix timmy77prix
New User | Posts: 9 | Joined: 08/09
Posted: 08/19/09
06:19 AM

I think that might be part of the problem. The car is a 77 grand prix, but the block came out of a 68 bonneville. I will give classic industries a call. Thanks  

Opontee Opontee
Guru | Posts: 1422 | Joined: 07/09
Posted: 08/20/09
12:28 PM

I was going to say that I have some, but they fit a Firebird. Won't fit an A (?) body.  
OponteeOpontee
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timmy77prix timmy77prix
New User | Posts: 9 | Joined: 08/09
Posted: 08/20/09
02:36 PM

Yea, i dont need the adaptor plates. I need the engine mount for a 1968 bonneville. The mount that bolts to the block. Cant find one anywhere. Thanks anyways.  

Opontee Opontee
Guru | Posts: 1422 | Joined: 07/09
Posted: 08/21/09
12:14 PM

Try this

http://www.jbp-pontiac.com/products/fasteners/motorMounts.htm

WRP-MM6 Engine Mount Adaptor Kit to put Pre 1969 Engines in 1970 & Up Chassis $49.95

Probably the only way you can do it.  
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barneyformula barneyformula
Addict | Posts: 3306 | Joined: 01/07
Posted: 08/21/09
01:44 PM

Opontee is right you need the adapter kit so you can put the 77 Grand Prix brackets on the 68 block and still use the 77 frame mounts. There is no way that the 68 brackets will bolt onto the 77 frame mounts.
Steve  
A little help... 'cause we don't all have to learn the hard way!

timmy77prix timmy77prix
New User | Posts: 9 | Joined: 08/09
Posted: 08/23/09
05:19 PM

Ok, I have the adapter kit to move the mounting holes forward. What i dont have is the mount that bolts to the adapter. I think i need the 77 brackets for a 400. I have the one that bolts to the frame. I dont know what is supposed to go in between.  

barneyformula barneyformula
Addict | Posts: 3306 | Joined: 01/07
Posted: 08/23/09
07:49 PM

I believe the brackets from the 301 will work (using the adapter plates), if you don't have them anymore, any brackets from any Pontiac V8 after 70 or 71 will work. Assuming your car has the captured rubber mounts on the frame.
Steve  
A little help... 'cause we don't all have to learn the hard way!

Opontee Opontee
Guru | Posts: 1422 | Joined: 07/09
Posted: 08/25/09
08:50 AM

I know the GP engine brackets are taller than the firebirds. I had a friend that tried to use GP mounts in a Firebird and the engine sat to high. Luckily for him, I had a  set for a FB. So I guess what I'm saying is, don't get them for what the engine is, get them for what the car is.


Does any of this make sense?  
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barneyformula barneyformula
Addict | Posts: 3306 | Joined: 01/07
Posted: 08/25/09
01:55 PM

My 1979 Formula (1975 Pontiac 350)uses the engine block brackets from a 1976 Lemans wagon with a 400 (the 400 was cracked, but I used the Th400 from the wagon) and it bolted in on the factory 301 frame mounts. The 1973 to 77 Lemans and GP used the same frame(except the side rails were longer on the GP) so there shouldn't be a problem. The firebird mounts that came with my 350 were identical but were too rusty to use.
Steve  
A little help... 'cause we don't all have to learn the hard way!

timmy77prix timmy77prix
New User | Posts: 9 | Joined: 08/09
Posted: 08/27/09
06:41 AM

Thanks for all your help. I am going on vacation, i will find some mounts when i get back.