428 Lp
Needsmorecoffee.
Joined: Oct 2004
Posts: 3,624
Likes: 2
From: CT
Most are FT heads and manifolds on those. Low compression heads. It's is possible they are FE heads like BD said. But my guess is FT heads. Post the heads casting number. It's between the center 2 spark plugs. That will tell exactly what they are.
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
Likes: 4
From: Smith Mountain Lake, VA
Well dont quote me on this..its only what I have read in the passed on some of the indusrial motors... Depending on the there Load rating will determan what heads were on it....But as mentioned the no brainer would be to get the head #s off the motor so they can be ID'ed...... the number is between the spark plugs \\ //
Post Fiend
Joined: Mar 2004
Posts: 6,056
Likes: 8
From: Union, Washington
Regular 428s used the same heads as the 390s. Only the CJ and SCJ used different heads. Most PIs used 390 heads too.
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Needsmorecoffee.
Joined: Oct 2004
Posts: 3,624
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From: CT
There are close to 50 different FE heads NOT including the high performance heads. Add about 20 more to include the hipo stuff. I beleive the FT heads had 5-6 versions.
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Hotshot
Joined: May 2003
Posts: 11,141
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From: south louisiana
Originally Posted by FFR428
For the most part they are. But some have slight changes that warrent a revised number. Also the early vs later in relation to port size.
Needsmorecoffee.
Joined: Oct 2004
Posts: 3,624
Likes: 2
From: CT
Originally Posted by baddad457
Not always a revised casting number though. Parts number possibly. For instance the C8AE-H heads, there were 4 versions. With and without Thermactor and std 8 bolt exhaust plus the 14 bolt exhaust.
Senior User
Joined: Feb 2007
Posts: 150
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i have a 352 out of a 63 galaxie i would love to rebuild to run strictly on lp and run it in my p/u. i was wondering what i need to do w/the heads. as i understand lp needs lots of compression. i hear that's why most lp converted cars/trucks in the 80's didn't impress the owners and most switched'm back to gasoline cause the motors at that era were low comp. i would also guess that's why diesel's love lp??
Elder User
Joined: Feb 2006
Posts: 788
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From: Cascade, ID
Funny?
Originally Posted by krewat
Who wants to bet on what casting number those heads are? So far, we've heard it might have a "T" in the third digit, or an "A".
I'm betting on a "J" !
I'm betting on a "J" !
What does it take to build an engine to run on LP? Does one want higher compression? I am pretty curious about this setup.