Heating Help

10 yr old Riello 40F3 burner or new Beckett end cone/tube/flange

I've been told that I need a new end cone, tube and flange for my 1986 Magic Chef oil furnace since the Beckett AF end cone is cracked and I just had the blower replaced but it doesn't want to start well or stay running w/o using a smaller than recommended nozzle..
I have the option of an entire 10 yr old working Riello 40F3 burner or NEW Beckett end cone/tube/flange install for approx the same price.
What would everyone's advice be if it were you?

Beckett Vs Riello:

I would go with the Beckett parts unless you find that a Riello is approved for your furnace. The Riello is a very hot burner and may byrn right through the HX. The Becket won't. If it came with the furnace.

Please check...

Your heat exchanger also. The blower for you warm air, through a cracked heat exchanger, could be blowing back, or blowing out your flame.

use a flame mirror

you will most likely find that the chamber has failed in the front, and burnt thru

A cracked end cone

is easily replaced without replacing the tube and flange. If the tube is damaged enough so that the end cone can't be replaced on it there is probably a bigger problem such as a cracked heat exchanger.