GT40p or new aluminum heads

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   I have been reading and doing a ton of research on getting more hp/tq out of the 351. Here is seems like the go to is/was GT40Ps, intake, cam. Im guessing 5-10 years ago the GT40Ps were cheaper, but looking now they seem to be about 1k for a pair. At that point I would think I would be better off getting a set of AL heads and add roller rockers for 2-300 more.

I have also read concerns of iron block with AL heads, but im not sure i really believe that is an issue with modern gaskets and studs.

Overall, what is everyone's opinion? Am i wasting money going with AL heads or is the performance and weight savings worth it. I dont have a problem spending the few hundred more, but if it is a waste I wont.

Also, I boat at 5k feet so i have to overbuild a little due to hp loss at elevation

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brantb Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: May-15-2019 Location: Colorado Status: Offline Points: 94	Post Options Post Reply Quote brantb Report Post Thanks(0) Quote Reply Topic: GT40p or new aluminum heads Posted: July-22-2019 at 1:04pm
	I have been reading and doing a ton of research on getting more hp/tq out of the 351. Here is seems like the go to is/was GT40Ps, intake, cam. Im guessing 5-10 years ago the GT40Ps were cheaper, but looking now they seem to be about 1k for a pair. At that point I would think I would be better off getting a set of AL heads and add roller rockers for 2-300 more. I have also read concerns of iron block with AL heads, but im not sure i really believe that is an issue with modern gaskets and studs. Overall, what is everyone's opinion? Am i wasting money going with AL heads or is the performance and weight savings worth it. I dont have a problem spending the few hundred more, but if it is a waste I wont. Also, I boat at 5k feet so i have to overbuild a little due to hp loss at elevation

KENO Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11191	Post Options Post Reply Quote KENO Report Post Thanks(0) Quote Reply Posted: July-22-2019 at 1:36pm
	You're lookin for heads in all the wrong placed then Around here on CCF, we're mostly pretty cheap and for a thousand bucks you can buy 4 rebuilt heads and have a couple of spares. Here's an EBAY link that you can sort through for rebuilt GT40P heads link

Orlando76 Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: May-21-2013 Location: Mount Dora, FL Status: Offline Points: 3108	Post Options Post Reply Quote Orlando76 Report Post Thanks(0) Quote Reply Posted: July-22-2019 at 1:37pm
	I’ll pull my running gt40p heads off and deliver them to you for $999.
	Please support The Cystic Fibrosis Foundation 1976 Ski Nautique 351 Escort 1993 Ski Nautique purple and black 351 HO PCM

brantb Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: May-15-2019 Location: Colorado Status: Offline Points: 94	Post Options Post Reply Quote brantb Report Post Thanks(0) Quote Reply Posted: July-22-2019 at 1:38pm
	any suggestions on where to look? Even looking through pick and pulls around me they want a premium

KENO Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11191	Post Options Post Reply Quote KENO Report Post Thanks(0) Quote Reply Posted: July-22-2019 at 1:43pm
	Here's an EBAY link that you can sort through for rebuilt GT40P heads link

KENO Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11191	Post Options Post Reply Quote KENO Report Post Thanks(0) Quote Reply Posted: July-22-2019 at 1:46pm
	And this link below talks about drilling the bolt holes to 17/32 of an inch for a 351 application or having the place you get them do it for you link

brantb Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: May-15-2019 Location: Colorado Status: Offline Points: 94	Post Options Post Reply Quote brantb Report Post Thanks(0) Quote Reply Posted: July-22-2019 at 2:19pm
	So looking through those i will refine my guess and say closer to $600 for a pair. Could go cheaper and hope to get lucky. So are you basically saying that going to AL heads isnt worth the extra 600 for the benefits I will gain, or saying the majority just dont spend the money, but the performance would be worth the money?

MrMcD Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3778	Post Options Post Reply Quote MrMcD Report Post Thanks(0) Quote Reply Posted: July-22-2019 at 3:00pm
	Why not call a local machine shop and tell them what you are looking for, they can probably have a set for you in 2-4 days with zero freight if you will call them.

GT40p or new aluminum heads

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