|
Group: Forum Members
Last Active: Last Year
Posts: 42,
Visits: 6.8K
|
  Came with a 292 that was supposed to be out of a 1955 bird. Had a 56 block and 57 heads. Is this a 57 distributor? Thanks Paul
|
|
Group: Administrators
Last Active: 2 days ago
Posts: 7.4K,
Visits: 205.0K
|
Both Paul and Joe have ordered the CRT distributors. Paul is having his dropped shipped to me and when I receive it, I’ll be measuring the gear location on the shaft to insure it’s not too low thus being in a bind within the engine I plan on testing it in. As a general rule, the MSD distributors for the Y have the gear positioned on the high side so none of those have an interference problem within the block. The gear being a little bit high is not a problem with the MSD distributors but being any shade of too low definitely is. Before sending that CRT distributor back to Paul, I’ll have him measure the distributor cavity in his block to insure that his distributor is also good for his particular block. Part of the problem with distributor gear placement lies in the block machining as not all the FYB blocks are at that 4.990”or more cavity depth for the distributors. While most are okay, there are those blocks that are machined too shallow on the distributor hole and just being 0.025” less than 4.990” does create a problem with some distributors. Hence the reasoning why MSD intentionally installs their gears on the high side for the FYB. The easy fix is just shim the distributor where it sits on the block with a special shim so it’s raised the appropriate amount. A fix that’s more involved is removing the gear and relocating it to the appropriate spot on the shaft that also coincides with what is needed at the block. The Ford 351W engines seem to be more prone to the distributor holes in the block being too shallow thus creating premature wear problems when replacement distributors are used. I’ve also come across this same problem with a 460 BBF block but that issue does not appear to be as common as what I find on the 351W engines. The 460 BBF was fixed by just simply shimming the distributor higher. All other engines I have corrected by just relocating the gear on the shaft which does involve drilling new hole for the pin that retains the gear to the shaft.
  Lorena, Texas (South of Waco)
|