BenY 2013,
There is nothing wrong with building on a rifle which has sentimental attachment for you. The M788 is a strong action but suffers from a weakly attached bolt handle. This is not a terrible thing, it simply means that you should avoid any extremely high pressure loads in this action. Guys that tried to push the pressure envelop would wind up with an extremely hard bolt lift and the bolt handle might snap off at the joint.
I've owned and built about a dozen rifles on the M788 actions from the .222 Rem. through the 6mm Rem. Have the gunsmith check all the surfaces and the threads before attempting to 'blueprint' these actions. Occasionally there is very little to be done so don't automatically assume that the entire process needs to be done. Your action should be checked carefully in case the original 'smith didn't perform up to par. Lapping 9 lugs into perfect contact is virtually impossible so if necessary, do a check lap before deciding on your plan.
When handled correctly, these actions can perform with extreme accuracy. Don't skimp on the barrel. Be sure to have a great bedding job done. Then enjoy!
Here is a little additional extraneous information:
EXTRA LONG ACTION 788'S......243, 6MM, 7MM-08, 308
Redfield 1-Piece Standard Scope Base Remington 788 <Extra Long Action Gloss>
This is for the 243, 6mm 7mm-08, 308....
The .243, 7mm-08, and 308 also take the same "3 Round" magazine
The 6mm takes it own Different 3 round magazine
The 243, 7mm-08, 308, 6mm all take the same stock...So I believe they are all EXTRA LONG ACTION
>>>>> STOCKS WERE MADE OF BIRCH <<<<<
LONG ACTION 22-250, 222, 223, 30-30, 44 Remington Magnum
Redfield 1-Piece Standard Scope Base Remington 788 <Long Action Gloss>
This is for the 222, 22-250, 223.....The 222 and 223 can use the same "4 ROUND"magazine
The 22-250, 30-30, 44 Rem Mag, All have there own seperate "3 ROUND"magazines
The 22-250, 222, 223, 30-30 take the same stock
The 44 Rem. Mag has its own stock and its own magazine
Barrel length....
Early model 243, 6mm 7mm-08, 308's had 22" / 24" and maybe some 20" Barrels
Later model .243, 308, 7mm-08 were Carbines and had 18.5" Barrels
22-250, 222, and 223's had 24" Barrels
44 Rem Magnum's had 22" Barrels
30-30's had 22" Barrels
Midway has both Redfield and Weaver one piece mounts in Long Action and Extra Long Action
The #'s for the Weaver two piece mounts are...
#75 (8-40) Thread
#76 (1/2)
Regards.