The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-12-2018, 06:38 AM   #1
jojomiamia
Registered User
 
Join Date: Dec 2016
Location: Paris France
Posts: 62
Cylinder head change

Hi folks,

I’m wandering about changing my cylinder heads for some perf upgrade.

By now, I have stock heads 113 cc oval ports open chambers (3999241) fitted on a 1972 BBC 402 L47 (3999290) with dome cast pistons 402P30.

And there are so many cylinder heads, as I am not sure to buy the right one.

Some of you guys did already bought heads compatible with this set ?

Thanks,

Last edited by jojomiamia; 05-12-2018 at 11:45 AM.
jojomiamia is offline   Reply With Quote
Old 05-12-2018, 08:15 PM   #2
Mike C
Registered User
 
Mike C's Avatar
 
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,709
Re: Cylinder head change

Big block heads can be a challenge if you aren't building your motor from scratch. The problem is that most open chamber performance heads are 121cc which will KILL your compression.

I would be looking at the Edelbrock Oval Port heads which have 110cc chambers. They also mill that head down to 100cc as well for late model TBI 454.

You will need to call Edelbrock and ask them about your piston compatibility if you go that way. I have some closed chamber oval port heads on my 427 (290 casting) and I have looked at the possibility of going to those heads (a) if I need to drop the compression due to detonation or (b) just a more powerful head.
__________________
44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
Mike C is offline   Reply With Quote
Old 05-13-2018, 02:28 AM   #3
jojomiamia
Registered User
 
Join Date: Dec 2016
Location: Paris France
Posts: 62
Re: Cylinder head change

Thanks for your help,

It’s not gonna be easy
jojomiamia is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 06:49 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com