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Discussion Starter #1
good evening :)

due to new regulatories i have to install a flexplate shield on my sbc/th400 combo. transmission blanket and engine diaper are already installed.

there is no way to install the shield because of not enough clearance between tranny and original firewall. has anyone fixed this problem on a '70 ?

thank you very much in advance

carl
 

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The only way you can install a shield is without a firewall or at least a heavilly modified one. Even the CSR's won't fit. I see you're in another country but who is saying you need one? Over here one is not required until you're car is going 9.99 or faster.
 

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Discussion Starter #3
The only way you can install a shield is without a firewall or at least a heavilly modified one. Even the CSR's won't fit. I see you're in another country but who is saying you need one? Over here one is not required until you're car is going 9.99 or faster.
thank you for the response

i'm from germany. since 2012 you have to install an engine diaper, a transmission blanket and a flexplate shield when you car is going faster than 10.99 in bracket classes. :mad:

my nova is running around 10.3 on 1/4 and 6.4 on 1/8.

i guess i have to switch to a sfi bellhousing....or modify the shield "a little bit".

greets carl
 

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An SFI approved bellhousing is probably your best solution unless you want to modify the firewall.
 

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Just so you know....

You cannot "modify" an SFI item. Once any modifications are made the SFI rating is null and void.

Go with the SFI belhousing.
 

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Discussion Starter #7
bellhousing

to understand it right: I have to cut off the old bellhousing and the SFI part is to be fixed with the oil pump bolts?

greets
carl
 

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I had a CSR full length shield on my TH400 in my 68. I had to make my trans tunnel bigger in the middle area, but did nothing to the firewall except put an access hole behind the gas pedal for a bellhousing bolt.

It was still a bit of a challeng to get the trans in because, I had to let the motor lean back so I can access the top center bellhousing bolt with a very long extension from underneath the car, but it can be done.

So I would imagine you could use just the CSR flexplate shield with a blanket if you wanted to or use the Superbell as suggested.
 

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to understand it right: I have to cut off the old bellhousing and the SFI part is to be fixed with the oil pump bolts?

greets
carl
Right.:yes::yes::yes:
 

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I added one after I saw a convertor explode. It was a fairly easy job it just took a while to cut and fit the bellhousing without taking off to much material. I also removed the BPO tabs for my clearance.






 

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Discussion Starter #12 (Edited)
pics

thanks for the instructions :)

I'm thinking about ordering the j.w. bellhousing....which model would you prefer for SBC - TH400?

by the way: do the longer bolts come with the bell?

greets carl
 

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thanks for the instructions :)

I'm thinking about ordering the j.w. bellhousing....which model would you prefer for SBC - TH400?

by the way: do the longer bolts come with the bell?

greets carl
It comes with correct bolts. You need to order the one that matches you transmission. Mine was for a T-350 because that is the transmission I was running.
 

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Are you sure you can't just install an SFI approved flexplate? I haven't raced in years, but NHRA accepted either the shield or an SFI approved flexplate in SuperStock years ago.
 

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Are you sure you can't just install an SFI approved flexplate? I haven't raced in years, but NHRA accepted either the shield or an SFI approved flexplate in SuperStock years ago.
Yea, things have changed, plus rules could be different in Germany where the O.P. is from.
 

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As mentioned, running the CSR full length shield is a tight squeeze. I had to raise up my shifter location just to get the cable routed in because of lack of space between the shield and floorpan/trans tunnel on my TH400. I now just run a J.W. ultrabell and a blanket for legal 9 second trips. More room than before.

Derek
 

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Discussion Starter #18
J.W. bell

Thanks for all the replies. I've ordered the 92451 bell from J.W. Transmissions and waiting for shipment :).

I'll keep you informed how it works......

greets
carl
 

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For those of you who don't want to cut trans. Deist sells a long trans blanket that bolts to the back 2 intake bolts and covers all the way back to the front of the tail shaft . It is SFI and They have no problem as it covers both the flex plate and the planets.
Heavy, and a pain to install But if you have a odd ball car or other special needs it is out there .
 

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Another vote for the ultrabell. Easy to install. I cracked a housing and this has been my solution ever since. No clearance issues other than the top passenger side bolt needs slipped in the housing first, then slid on the engine pins.
 
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