So I have decided the 289 in my mustang has gotta go - I need to upgrade! I want something that will work well with the TFS heads I put on the engine just last year - they are 61 cc combustion chambers with no porting or polishing work done on them. I have been looking at some 347 roller short blocks, anyone have suggestions? Looking for the most bang for the buck, pretty much like everyone is! Any one have some short block purchase success stories? Any recommendations? As always, any help is greatly appreciated!