[Sycraft]

Cowl Bar Installation
The parts required for installing the cowl bar are:
Description of Part Quantity
Cowl Bar ........................................... 1
5/16" x 3-1/2" Bolts ........................... 4
5/16" Flange Nuts ............................ .4
Use the procedure outlined below to install the cowl bar:
1) Place the cowl bar on the outriggers flush up against the firewall (Fig. 3-104).
2) Align the mounting holes on the cowl bar with the holes on the outriggers. Connect the cowl bar to the
outriggers with two 5/16" x 3-1/2" bolts and flange nuts per side (Fig. 3-105).

this is the only reference I have