I was thinking of installing a Ford E303 or B303 cam in my '92 Pony.
But, since the engine has about 142,000 miles, can it handle the cam or should I rebuild it first?

 

def rebuild that baby

 

i wouldn't if it runs okay. there is many 5.0's that run past 150k no problem. there are other mods you should do before a cam though.

 

i would have to say rebuild that way you know everything will work for a while

 

if you don't have the cash for a complete rebuild,at least
go with a valve job on the heads and new springs..

 

i would save up for a while and rebuild it with some performance parts.

 

SLOW DOWN GUYS

Look a engin is not a gallon of milk , it does not have a experation date . It ant nothing nore than a cast iron pump . If you have good compression and it does not use to mutch oil ,the olny thing a rebuild will get you is OUT 1000 BUX and right whare you are now

you olny said 142 tall on the clock , that means nothing the shape of a engin is vacum and oil pressure

I sall 302 go as far as 350,000 miles and as little as 35,000 ( god damn mancennie motors) . what kind of shape is the engin in you got to figure that out by doing some basic test . Then you will know what cards you hold

 

if the motor is strong, just put the cam in and dont worry about it

 

I threw on ported (stock) heads, cam, Tbody, MAF and headers/h-pipe at about 110000 miles. When I popped the heads off, I could still see the crosshatch bore marks on the cylinder walls. If you dont see those, don't get a cam. My 2 cents.

 

just remember this everything has to coordinate in order to make any good power so maybe a rebuild w/ high performance internals and the cam you want, and don't forget you should set it up for what kind of racing or driving style you like...