MY MACHINEST CALLED ME TO ASK WHAT ANGLE THE FLAT PART SHOULD BE. I SAID READ THE INFORMATION THAT I GOT OUT OF THE MANUAL FOR HIM. HE SAID "NOTHING EXPLAINS THE ANGLE TO THE LOG WHICH IS ON AN ANGLE. DO I GRIND PARALLEL TO THE GROUD OR PARALLEL TO THE LOG ?" ALSO IS JB WELD GOOD FOR THE FILLER. WHAT HAVE OTHERS USED TO FILL THE GAPS. THANK FOR ANY HELP.
machining a 250 head for prepping the log for a weber carb..I am new
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It should be machined so that it matches exactly the current carb's mounting base. Then when the head is reinstalled and new carb is bolted on to the head the carb is going to be level in both the front to back and side to side planes. Some people do use the JB Weld also some weld in or use the braising process to fill in the low spots before the finale machining. In my opion the last two are the very best choices to use. Good luck 
wsa111":1xbl3sgn said:
16 degress of the bolt spacing slew, but every Ford engine is mounted at 3 -1/2 degrees, and thats the angle the machined section should be ground to.
It doesn't matter if its a 2300 Holley #4412, or a Holley Weber 5200/6200 or Weber 38, same deal.
Crosley got it all worked out...
I'm a bit more partial to Crosley's twin 2-bbl myself, then you can leaqve the center carb boss in there, and not risk cracking the casting.
and Asa's looked pretty darn good too
Its all good....23 degrees is the carb bolt pattern swing.
Although it varies a little acording to CoupeBoy.
I measured 3 degrees 20 minutes in 1996 when I did my X-flow 500 Holley carb adaptor, and a Crossfire 350 Chevy adaptor. Putting two Rochester 2GC'son a flat intake designed for Twin 1 bbl throttle body injection was....kinda dumb.
By photo editing in Excel, I got between 3 and 4 degrees (357 ot 356 degrees the cock a$$ way its done by Microsoft...)
According to the late Phil Irving, the Weber carbs can hack a 5 degree tilt off level if you really must.
A cement highway road cross fall is 2 to 3 degrees.
Although it varies a little acording to CoupeBoy.
I measured 3 degrees 20 minutes in 1996 when I did my X-flow 500 Holley carb adaptor, and a Crossfire 350 Chevy adaptor. Putting two Rochester 2GC'son a flat intake designed for Twin 1 bbl throttle body injection was....kinda dumb.
By photo editing in Excel, I got between 3 and 4 degrees (357 ot 356 degrees the cock a$$ way its done by Microsoft...)
According to the late Phil Irving, the Weber carbs can hack a 5 degree tilt off level if you really must.
A cement highway road cross fall is 2 to 3 degrees.
I like the:
"...use the braising process to fill in the low spots before the finale machining…."
We have several pic of hack jobs and even fewer (that I found) of good results.
Plez use the search function or check the 'stickies' to see several good examples.
For his info it's "parallel to the ground" (seems obvious, but glad he asked) but the engine sits in there at the angle described above.
Good Luck, let us know how you do!
"...use the braising process to fill in the low spots before the finale machining…."
We have several pic of hack jobs and even fewer (that I found) of good results.
Plez use the search function or check the 'stickies' to see several good examples.
For his info it's "parallel to the ground" (seems obvious, but glad he asked) but the engine sits in there at the angle described above.
Good Luck, let us know how you do!
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