Warning...Rookie at the wheel here. I have just aquired a 1975 Ford F-100 form a deceased family member. He had this truck since 76 and is all original. I have spent some time researching history on this truck and have aquired original five volume 1975 Ford shop manuals covering everything. My intent is to restore.

To the point. The truck has 390 FE engine with 2 barrel carb. After plugs and an air filter it runs pretty good with plenty of power. I went to my local machine shop (very reputable in this area) and they informed me that this blocks biggest weekness is its oil feed system. It does not support enough volume for high HP output. I want to build this to around 400hp. Does anyone have experience in correcting this problem or know of any online reading with more info.

Also, the block has a backwards 105 just below the driver's side head. I am told this is a good thing. Make since to anyone?

TIA

Bill