A904 Valve Body Interchangability Question

[gerahead]

I am in the process of rebuilding a 904 transmission for my 71 Dart that will have a 340 in it. The transmission I have rebuilt is from a car that had a 318 in it. I have completely finished the geartrain rebuild and am making the modifications to the valve body to install a Fairbanks shift kit. I made the mistake of following the Fairbanks instructions and drilled through the valve body casting. I have a core 904 from an AMC car with a 258 ci engine that is complete. The core valve body upper casting and separator plate are physically different. Can I bail myself out by using the core valve body, if I use the complete assembly, or did I screw myself big time? Thanks for your help!

Pic of the 318 top side valve body and bottom side showing the part number. Cover plate has 6 screws.

Pic of the core valve body top side and bottom side showing the part number. The cover on this assembly only has 4 screws.

 

[Desoto291hemi]

I’m pretty sure you can patch a drilled hole with some lead or epoxy
That housing is not ruined

Tommy

 

[gerahead]

I’m pretty sure you can patch a drilled hole with some lead or epoxy
That housing is not ruined

Tommy

Thanks Tommy! I thought about trying epoxy, but I haven't thought of a way to keep it from dripping down into the cavity that I drilled into. I was able to source a replacement valve body that is identical to the one that I damaged. I guess now I have another spare! L8r!

Jim