Bad Filter cap

[freakaftr8]

Hey guys, I picked up a maggie B&W combo from craigslist...
Cannot tell but looks like early 60's late 50's.
Fired it up on the variac last night. Got it up to voltage and it ran for about an hour. Raster on the bottom started to shrink and the top stretched vertically. Then hhere is a paper filter cap on the chassis, the only paper cap on the unit, started to sizzle.. This cap is a 200v 130mfd can style cap. I cannot locate that rating. I did however find a 400v 100mfd electrolytic. Think it's safe to use that in it's place?