You can probably fix it in place.. Remove the side cover.. Your going to need a "hand impact driver".. the screws are VERY tight.
The control rack is probably stuck & can be freed-up w/a little persuation.
But to answer your question.. yes, you have to access the front of the pump..
IF you remove the side cover, you can rotate the engine until #1 tappet starts to rise.. that will tell you your coming up on #1 compression stroke on the engine & look for timing marks on the gears.. Once you find them, keep rotating the engine until the marks line-up & THEN pull the pump..