Offshoreonly.com - Oil Pressure Switch Please help

HI All, Just installed a Holley Red Fuel pump. Got everything in Fine except the Oil pressure saftey switch. I bough a "T" fitting to mount the switch with my oil pressure sender. 2 Problems...The motor is so tight against the stringgers that I can not get the Oil pressure sender out and even if I can the dipstick is in the way so there is no way I can spin the "T" fitting on...Please help!! Is there any other place on the block I can install the oil pressure saftey switch...I noticed that about an inch to the right of the existing oil pressure sender (Right above the remote oil filter housing) there is a allen head screw recessed into the block.....can I mount the switch there??

Thanks