K member notching question

Why is it that every thing you have to install or bolt up on a small block A body seems to be a pain in the neck last two spark plugs dr side, starter, headers, header bolts, oil pan the list goes on. Wish I’d have a dollar for every skinned knuckle and every swearing fit my car would be free. Sometimes l’d like to find a Chrysler engineer and ***** slap ‘em But I guess that one of the reasons we love
Small block A body’s