Hey folks,
I am building an adapter plate, and need a measurement off of the back of a 5.4, having a b**ch of a time finding one to look at. If you have one pulled could you check it?
I need to know the distance from the block bellhousing surface, to the surface of the crankshaft (where the flywheel bolts on).
All you need to do is lay a straight edge across, then use a caliper to measure the offset, if any.

Thanks in advance!

 

No such thing as "block bellhousing surface" --- the block has no "bell housing". For modular's Cranks normally protrude about 1/16' off the back of a block, the crank's pilot (where the pilot bearing sits) normally protrudes an additional 1/8" .

If you're talking the transmission bell housing those numbers will be different based on trans type (e.g 4r70w), manual / flywheel (with a pilot bearing installed in crankcase end) or automatic / flexplate (with a torque converter's pilot fitting inside the flex plate, crankcase end).

Some known 5.4L numbers:

pilot bearing ID: .672
crankcase pilot OD: 1.487

torque converters (when properly seated - LOL) recess approx 1.25" back behind the front of the trans bell housing. The front facing pilot on the torque converter should also recess behind an "imaginary plane" of the outmost trans bellhousing surface) -- ideally, by some + amount.