bottom two in limped pot

So both villains are basically playing like maniacs, both are running about 30/20/5, and I have been very active at the table up to this point. I'm wondering what is my best play on the flop...when it was going down I thought that it was basically a shove or fold on that board with 2 opponents. I dunno I just thought calling OOP in a 3way pot on that board would be the worst option, and that any other raise size committed myself, so I might as well go ahead and ship. I'm wondering how much merit there is to folding here? In a limped pot should I always be going broke on that board with bottom two against those opponets?



$0.25/$0.50 No Limit Hold'em Cash Game, 9 Players
Hand Converted at CardRunners.com

UTG: $53.75 (107.5 bb)
UTG+1: $15.10 (30.2 bb)
MP1: $62.55 (125.1 bb)
MP2: $49.85 (99.7 bb)
MP3: $31.45 (62.9 bb)
CO: $50 (100 bb)
BTN: $30.80 (61.6 bb)
SB: $47.30 (94.6 bb)
Hero (BB): $74.55 (149.1 bb)

Pre-Flop: Hero is BB with 4 7
UTG folds, UTG+1 calls $0.50, MP1 calls $0.50, MP2 calls $0.50, MP3 calls $0.50, 3 folds, Hero checks

Flop: ($2.75) 8 7 4 (5 players)
Hero bets $2.50, UTG+1 folds, MP1 raises to $9, MP2 calls $9, MP3 folds, Hero raises to $74.05 and is all-in, MP1 calls $53.05 and is all-in, MP2 calls $40.35 and is all-in

Turn: ($176.20) 5 (3 players, 3 are all-in)
River: ($176.20) K (3 players, 3 are all-in)