FrontEngineDragsters.Org Forum

Technical => Roo Man's Room => Topic started by: janjon on April 05, 2013, 10:34:58 AM

Title: Motor plates
Post by: janjon on April 05, 2013, 10:34:58 AM

Does anyone know where I might find block bolt patterns, front and rear, for small block Chevy, for purposes of building engine plates? Any help appreciated.
John

Title: Re: Motor plates
Post by: GlennLever on April 05, 2013, 11:51:01 AM

Quote from: janjon on April 05, 2013, 10:34:58 AM

Does anyone know where I might find block bolt patterns, front and rear, for small block Chevy, for purposes of building engine plates? Any help appreciated.
John

This should help get you started.
This print shows the rear of the “Small Block Chevy” block including bell housing bolt hole pattern w/dimensioning including crank centerline etc.


(http://i17.photobucket.com/albums/b81/BRAAPZ/Rusch%20Motorsports/SBCprintCustom2.jpg)

Title: Re: Motor plates
Post by: wideopen231 on April 05, 2013, 03:16:05 PM

I use old power glide case for rear and set of threaded dead centers for front,simply screw then in and lay plate ofer them and tap with hammer.it makes perfect punh makrs fro drilling them. I guess you could do same on rear.  You can cheat and make a set in lathe or drill press,

Title: Re: Motor plates
Post by: janjon on April 05, 2013, 07:52:35 PM

Thanks so much for the help and tips, Glenn and wideop.
John

Title: Re: Motor plates; now head bolt dimensioning
Post by: janjon on March 19, 2015, 06:28:35 PM

Might there be a similar drawing for SBC cylinder heads? Having to modify existing stud girdles to accept larger rocker nuts; there's some variation between center distances of the studs on the the heads, as measured, would be nice to know what it's "supposed to be". Any help appreciated, as always here.
John

Title: Re: Motor plates
Post by: dreracecar on March 21, 2015, 11:42:10 AM

Chevy rear dowel pins are .6200, dont mistake them for .625 (5/8"). you will need to get a chucking ream cut down to to proper size

Title: Re: Motor plates
Post by: janjon on March 22, 2015, 07:33:38 AM

Calipers confirm that you are correct, sir, as always, thanks.

Title: Re: Motor plates
Post by: dusterdave173 on March 22, 2015, 09:19:53 AM

Janjon I have tried that and it is hard to make it work out--I can sell You Jomar girdles cheap that are correct for any head / valve location  Jomar makes them for everyone--if you are off just a tad it puts a strain on the stud and can mess with the lash and what not--let me know exactly what head you have and stud locations--I can drop them on your door

Title: Re: Motor plates
Post by: janjon on March 26, 2015, 06:45:21 PM

DusterDave please message me some contact info or e-mail me john@majormetals.com
Thanks