When I was installing the new fuel pump pushrod it got tight about 3/4 of the way in so I stopped I didn't wont it to get stuck.It's a Howards cams pushrod .500x5.750 I put assembly lube on it before I pushed it in. The block is a gen iv. I never had this happen before they always slide right in, anybody have any ideas.

Did u try to rotate the motor like 90 degrees or so? I like to use grease on the pushrod so it stays up in the bore and will not fall out.

Have you had a pushrod in that block before? Do you have another pushrod to try? Maybe try to roll the Howards pushrod on a piece of glass to see if its bent.

Ya do what Vinny said. had one with an unnoticeable tweak/bend it bound up. found it to have the slightest arc in it. good luck

The pushrod is brand new,I'll try rotating the engine.

I know on a sbc if you use too long a bolt in one of the front accessory holes it'll interfere with the push rod, don't know if that's the case with your block.

Rotate the engine. Its probably on the raised portion of the cam lobe. Throw some grease on it so it stays up, and install the pump. Should be good to go.

It could be a dirty/rusty hole. Has motor been apart a while

A dirty hole can cause issues in any application.

warning,a dirty hole can be a health hazard.