Technical y/FE rockers question

Quick question, I know of a set of rocker arm ***emblies that are for sale. However, they are set for a Y block but appear to have FE rocker arms on them. where the arms interchangeable? The reason I am am asking is the pads don't have the extra wide foot print for the valve stem. That and several seem to be bent so they hit the valve stem. The one thing they have going for them is that I think they are the quick ratio lifters. I am considering buying them to resel for what I paid for them., not to make a profit.

Thanks,

Mike

 

The regular rocker for the y-block has a 1.43∶1 ratio, the sought after performance rocker has a 1.54∶1 ratio, it will have ECG 6564 casting number.

Y-block shaft is 0.780”, FE is 0.840”), shaft length (Y-block is ~1.25" shorter), and rocker ratios (Y-block 1.43/1.54 vs. FE 1.76), requiring significant custom machining to fit

 

Thanks, I did not see a casting number which I thought was odd. But if they are the performance ratio rockers I will get them and then resell them for what I paid for them.