You have a 351w block.
This is the pan for the Cleveland in a Pantera.
http://aviaid.com/shopsite_sc/...s_sbf_cleveland.html
This is the pan for a Windsor block in a Pantera.
http://aviaid.com/shopsite_sc/..._oilpns_sbf-ss3.html
I don't know why you loose capacity with it. I think the answer simply is that the block is different enough that they need to fit a smaller pan to it to fit the chassis?
I have the Aviaid in my Pantera. I have a Canton in my Shelby.
I actually think that the Canton is a higher quality.
The Aviaid is old school and being built the same way as in the 60's and early '70's.
The finish could be A LOT better.
Armondo's is really the same pan but it now more expensive.
7 quarts is ok in a Pantera but in addition I'm using an oil cooler with dual oil filters with it. By the time I fill the system it's about 12 quarts.
It takes so long to heat the oil up I have to use a remote oil thermostat.
Oil that is too cool is as bad as too hot.
7 without a cooler is probably fine for the street.
The problem with the original 5 quart system is similar to the original 5 quart FE pan. You are going to pump the pan dry at high rpm.
That would not be a good thing to do.
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