get a 3/8 impact on them... something to jar them around but not enough umph to straight up snap them off... the impact tends to free rusted and galded things up... used to work at an exhaust shop and manifold studs would usually come out with the impact or some heat...if the engine wasnt alreay out i'd actually tell you to run the truck up to operating temp and take everything loose. if all else fails put a little heat to them i dont recommend heating the head extensively (un even heating causes warping) and sometimes they have to break... as long as they dont break off flush with the head and leave about 1/2 inch shank a stud extractor will usually do the trick.

 

ha ha well the 2 i broke are flush no big deal just drill and tap
i willl have to use the heat all i got in a 3/8 gun is my snap on and that will bust um for shure

 

should be able to choke it down abit...and use quick bursts... dont hammer on it... be sure to center punch the bolt and use a sharp bit and avoid snapping the easy out off; you WONT be able to drill that out

 

true

 

heat the hell out of the exhaust manifold bolts, if they break weld a nut onto whatever's left sticking out and try that.

 

one problem with the nut idea... usually penetration only makes it to the tip of the bolt and side of the nuts... it doesnt usually yeild too much strength for torsional movement unless you can get to the backside of the nut and put a tack or two there too... welding a nut is a perfectly fine solution; if you have a stud extractor i'd try that first

 

heads cracked from injector to exaust seat on all 6 got a 2gen head and DDP stage 4 injectors i got the complete head for $250 good deal huh anyone want the cracked head (1990) and the
9mm (1990) injectors? pm me

ALSO SEE THE ARP THREAD

 

you're going to need to get the 9mm to 7mm adapters and put a set of first gen injectors in that head... 2nd gen injectors being pushed by the VE is a no no...

 

Only the 1st Gen 89-91.5 heads are 9mm.

 

i got a set of 92-93 I/C injectors why do i need adaptors?