I could use some help and info on my 400. build date B063, casting #481988,
stamp on front 516672 under # YT.
The heads build date B032, casting #7M5
The intake build date B193, casting #494282,fire order 18436572
The exhaust build date B223 casting #490 142-8 & #490 143 2
Know reading a lot of threads here I've learned a lot, some of you guys really have a wealth of info. and its been very helpful!!
I got the build date down like B063 is Feb.6th.73
The YT under the stamp # I think is a 400 from 72,73,74
And the heads 7M5 are off a 455 I think?
Know with this info. before I start tearing it down for rebuild, is what I have worth the effort? And would I be able to get 380 to 420hp.
Any help will be greatly appreciated, Thanks Mike