xtturbo

will 1965 289 heads fit a 1993 5.0 mustang ho motor?....just making sure before i buy...the 289 heads are all done up....thanks...also they are 54 cc heads...how much will it bump my compression up?

mjr46

IF i REMEMBER RIGHT when installing 289 heads or 60's heads on a late model roller block.. steam holes need to be drilled in the block to parrallel that of the ones in the heads

xtturbo

figures...the guy that is selling them said they would run perfect for my setup. he never mentioned steam holes. for the price i knew it was to good to be true

mjr46

WHEN YOU BUy fel-pro gaskets.. there is a little white slip of paper in the package that gives you torque sequence and specs and it mentions briefly about when installing early heads on a later block the mod that needs to be performed.. most overlook this detail

xtturbo

i was told too buy the 65 gaskets for the intake ....what will happen if i dont do this modification too the block?

mjr46

the steam holes are there to provide adequate cooling to the heads if you don't put them in....it's a possibility it'll run hotter than desired

xtturbo

ok......where are the holes supposed to be drilled...so i know ...in case the machine shop doesnt know...they are as dumb as a stump, only do what you tell them to do

mjr46

you'll have to have the gaskets for the 289 heads and lay them down on the block surface and where the holes are in it mark it with a marker and drill them.. I believe tere a 4 per side to do = 8 total

xtturbo

oh ok...this guy told me to buy 85 ho gaskets...he sai dhe been running the setup for years with no problems....i never did ask him if he ran a street car with the heads...

mjr46

what year block was he running??