Part interchange?? 289/5.0??Heads??

shark7000 · 05-08-2009, 07:43 AM

I've been reading about how 289 heads having a lower volume, causing higher compression. The newer 5.0 heads will give a lower compression, and the GT40 heads are, of course, the best, with higher compression and better flow, resulting in more ponies to the wheels. So, I'm guessing it's a better idea to not put the 88 heads on my 67 289. Any input would be greatly appreciated.
Thank you,
Mark

bmxmon · 05-08-2009, 04:52 PM

Yeah I was going to say that if they do bolt up (Which im pretty sure they should, I dont see why they wouldnt, though I wasn't 100% sure so I didn't post) they will have a lower C/R than the old heads. Look at the casting numbers in the heads and you should be able to google the combustion chamber size and compare.
I still think it would be best to just drop the 5.0 in there. You could still run a carb, just swap out the intakes. The 5.0 will have a roller cam and revised firing order. You would also have to install a fuel pump eccentric. I would imagine the 289 cam cover would swap over to the 5.0.

Mustangs Plus - Tech Articles - Project EFI GT (Page 1)

That is a pretty good article on swapping over to EFI.

shark7000 · 05-10-2009, 01:49 PM

That link is the one I had already found. I found it with a google search, so it must must be fairly popular these days. This one looks easier than the whole 5.0 swap. They forgot to put new frame supports, since the EFI is in the way of the original supports. I found another link with example of some brackets/supports that this guy made himself, then had it chromed. It looks really good. If I could just find that now. .................................................. ....................
.................................................. ........................................
Okay, I found it.
http://jr.stangnet.com/images/DSC00564.jpg

bmxmon · 05-10-2009, 06:32 PM

That does look really good. If I were in your shoes though I would get them powder coated. Has to be quite a bit cheaper than chrome. I'm not a huge fan of chrome though, but that one you found looks good.

shark7000 · 05-10-2009, 10:20 PM

No chrome sounds better on the wallet. But how much does powder coating cost? I've never had it done. I've seen pictures of part coated and they look good. I'll have to check on that.
Thanks,
Mark

jovyarcher · 10-19-2009, 08:55 PM

Quote:

Originally Posted by shark7000

No chrome sounds better on the wallet. But how much does powder coating cost? I've never had it done. I've seen pictures of part coated and they look good. I'll have to check on that.
Thanks,
Mark

There are some powder coating that cost less (I saw one on ebay I think) but if you want it to be done by car mods it will definitely cost more... seriously powder coating the car makes the ride look good.

goodyear1984 · 11-16-2009, 10:31 PM

screw it,crack your wallet open and build a 500hp 347

05-08-2009, 07:43 AM	#1
shark7000 Registered Member Join Date: Jan 2009 Posts: 13	Re: Part interchange?? 289/5.0??Heads?? I've been reading about how 289 heads having a lower volume, causing higher compression. The newer 5.0 heads will give a lower compression, and the GT40 heads are, of course, the best, with higher compression and better flow, resulting in more ponies to the wheels. So, I'm guessing it's a better idea to not put the 88 heads on my 67 289. Any input would be greatly appreciated. Thank you, Mark

05-08-2009, 04:52 PM	#2
bmxmon Registered Member Join Date: Mar 2004 Location: Minnesota Posts: 950	Re: Part interchange?? 289/5.0??Heads?? Yeah I was going to say that if they do bolt up (Which im pretty sure they should, I dont see why they wouldnt, though I wasn't 100% sure so I didn't post) they will have a lower C/R than the old heads. Look at the casting numbers in the heads and you should be able to google the combustion chamber size and compare. I still think it would be best to just drop the 5.0 in there. You could still run a carb, just swap out the intakes. The 5.0 will have a roller cam and revised firing order. You would also have to install a fuel pump eccentric. I would imagine the 289 cam cover would swap over to the 5.0. Mustangs Plus - Tech Articles - Project EFI GT (Page 1) That is a pretty good article on swapping over to EFI. __________________ Alex

05-10-2009, 01:49 PM	#3
shark7000 Registered Member Join Date: Jan 2009 Posts: 13	Re: Part interchange?? 289/5.0??Heads?? That link is the one I had already found. I found it with a google search, so it must must be fairly popular these days. This one looks easier than the whole 5.0 swap. They forgot to put new frame supports, since the EFI is in the way of the original supports. I found another link with example of some brackets/supports that this guy made himself, then had it chromed. It looks really good. If I could just find that now. .................................................. .................... .................................................. ........................................ Okay, I found it. http://jr.stangnet.com/images/DSC00564.jpg

05-10-2009, 06:32 PM	#4
bmxmon Registered Member Join Date: Mar 2004 Location: Minnesota Posts: 950	Re: Part interchange?? 289/5.0??Heads?? That does look really good. If I were in your shoes though I would get them powder coated. Has to be quite a bit cheaper than chrome. I'm not a huge fan of chrome though, but that one you found looks good. __________________ Alex

05-10-2009, 10:20 PM	#5
shark7000 Registered Member Join Date: Jan 2009 Posts: 13	Re: Part interchange?? 289/5.0??Heads?? No chrome sounds better on the wallet. But how much does powder coating cost? I've never had it done. I've seen pictures of part coated and they look good. I'll have to check on that. Thanks, Mark __________________ 67 Mustang Coupe w/289 & 4 speed

11-16-2009, 10:31 PM	#7
goodyear1984 Registered Member Join Date: Dec 2006 Location: new york Posts: 482	Re: Part interchange?? 289/5.0??Heads?? screw it,crack your wallet open and build a 500hp 347 __________________ 347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters ^best et so far 11.6 1.61 60ft coming soon 9sec et's 1992 mustang gt 2001 gmc 1500 4x4 78 century boat 92 skidoo

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