Freeze off works, use it all the time.

However if you broke off that many its time to have pros tinker with it.

 

I agree with this, since so many broke off.

 

I didnt break the bolts the idiots i had putting the headers in while i was at work did. Believe me i ripped them a new a hole lol. I told them everyone knows on exhaust manifold bolts you cannot just torque the bolt off you have to kinda have a plan i would have understood one or 2 but 8 i was pissed when i got home

 

This is a situation where i can truly say i should have listened to my wife and done it myself

 

I would have been pissed!!! After pulling my engine and soaking the header bolts for 3 days with PB Blaster I still broke 2...

and yeah maybe you should have done it yourself... Could hardly be worse than it is now. Hope you didn't pay the dummies too much to just make a huge mess for you!

 

Nope they got like 10 bucks out of the deal they scrapped the cats and after getting the parts for my truck they were left with enough to buy a couple packs of cigs
and yes i was EXTREMELY pissed. I told one of them "when i am working on your crap i dont just hurry to get it done i make sure it is done right are you freakin kidding me 8 out of 16 bolts F***!!"

 

Nothing that can't be fixed... You know I found a pair of E7 heads on craigslist for $100 already machined... You might want to just take a look around for a pair that have already been machined and bolts removed... then pop you old heads, replace gaskets, put new heads on, put headers on, bolt up top end. Might be cheaper in the long run... Just a thought... Don't know waht a machine shop will charge to pull those 8 bolts... Or if you can get them out or not...

another thing you might try is to use duct tape to make a sealed dish around the header bolts... fill them with pb blaster so eventually the pb sinks into the broken off bolts.
yet another trick from the bag of ninja skills I have... remember to use a degreaser before making the duct tape dishes... duct tape doesn't stick to surfaces that have been lubbed up believe it or not... easier but not as effective would be soaking cotten ***** with the penetrating oil and packing at base of broke off bolts...

 

yeah i am going to try everything before i send it to a machine shop

 

would the heads off a 1970s 351w work on my block and sd computer? These heads have just been redone on my spare motor and i thought they may be compatible but i want to know if they will work out.

 

Anyone? Anyone at all

 

i think they would work... I wonder if the comustion chamber would be the same... You might want to check and see what type of heads you have on the 1970 and post the numbers. You might also get a better respose if you ask on the older truck forums...

 

if you feel like being spendy you might take a look around for some good used gt40 heads and give yourself some extra power... just a thought...

 

I will take a look at the heads when i get home and post the cast numbers on here i would assume they would work because they bolt the same and they didnt do much changes to the combustion chambers over the years at least to the cast iron heads. Maybe Conanski can tell me after i get the cast numbers.

 

yeah but i dont have a maf kit for the gt40 heads to work well

 

numberdummy could probably tell you w/out the cast numbers too since hes the resident parts expert... if the bolt pattern, headers, and intake bolt up i would say go for it! but again the combustion chambers might be bigger or smaller which would change your compression ratio. I don't know if that would matter or not.