I'd like to point out here, that the amp he is working on does not have main filter can caps like your amp. His amp has the main filter caps inside the chassis. Those tan tubular "dynamite stick" looking things. If you go this route to use different value filter caps, those F&T or other brand axial caps, will need to be fastened somewhere inside the chassis, You will need to find room for them and fabricate a bracket of some sort to hold them. If you do this, and also remove your existing can caps, you end up with 2 large empty holes in the chassis. My personal preference would be to find appropriate can caps that fit your chassis. Unfortunately they will be more expensive than the axial type.