Is this to lift up an existing install ?.
Depends on which method you use starting from scratch.
Two methods that I know that are the simplest to "adjust".
There is a commercial "U" style under sump tube mount that is available . Where you fit the mounting flanges inside the chassis rails determines height.
Front saddle type similar in principle to the one depicted on the link, except that is constructed in a different design with more material lower on the outer extremeties with right angle tabs protruding forward that will sit on donut mounts fitted in the stock position on early Ford chassis. I have used this method with Cortina engine mounts for Chev in a 35 Ford. Similarly a Y Block Ford in a 32 Ford I had used similar set up. You can raise this style obviously with spacers. Or use Jag mounts that are taller.
If this is any help.
OZ-E-Rodders Rod and Kustom Club Member #31