[Amc-list] V8 Cylinder Head Questions - Follow up

[Greg Taylor <amundaza@xxxxxxxxx>]

Hi all,
  I am doing some work on my 1989 Grand Wagoneer engine and am considering swapping heads while I am at it.  I need some feedback from the experts, please!
   
  My Jeep has a stock remanned 360, which is probably 0.020 or 0.030 overbore.  Reman company is unknown, but it has about 60,000 miles on the reman (10 years old).  I'm pulling the front timing cover to fix a coolant leak behind the fuel pump.  I'll be installing a new Bull Tear front cover and nickel plated pump cover, double roller timing set, GM HEI, & a hi-flow water pump for this build up.
   
  I am also considering pulling the intake and heads while I'm at it and installing some 'built' heads.  I have the '79 304 (59 cc) heads I was building up for the 304 stroker turbo motor.  I have ported and polished them and they are currently machined for CHEVY Milodon Megaflow 1.94 Int & 1.50 Exh. valves (I know, they're smaller than stock 360).  I am considering having them machined for larger Chevy valves, as Milodon makes much larger Megaflow valves.
   
  How much larger can I go on a 360, with intake and exhaust valve size?
   
  The 304 heads had had the combustion chambers opened up as detailed in Performance American style, so they are probably about 61-62 cc's in size now.  How much would this drop the stock 360's 8.4:1 compression?  If it would drop too much, how much can I mill off the AMC heads, to bring compression back up?  IF I could machine 0.100" off the heads, there are 0.100" longer Chevy valves that would make up the difference in valve height so that "theoretically" the pushrod length would not be affected.
   
  Lastly, my 304 heads have been machined for 3/8" studs for the Harland Sharp roller rockers I plan to install.
   
  *** ADDED FOLLOW UP ***
  How much would compression be raised if the 52.2 CC 70-71 304 heads were installed?  Just curious.  Stock 360 is 58 CC for my 1989 GW.  Thanks!
  ****
   
  Thanks for the feedback, all.


Sincerely,
Greg Taylor :)  <><

And the testimony is this, that God has given us eternal life, and this life is in His Son. He who has the Son has the life; he who does not have the Son of God does not have the life.  - 1 John 5:11-12
       
---------------------------------
Be a better friend, newshound, and know-it-all with Yahoo! Mobile.  Try it now.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.amc-list.com/pipermail/amc-list/attachments/20080103/7ab286bd/attachment.htm 
_______________________________________________
Amc-list mailing list
Amc-list@xxxxxxxxxxxx
http://www.amc-list.com/mailman/listinfo/amc-list