6066 (1960-1966) GMC Truck Club Bitcoin now accepted here! 
Pay Dues
Pay Dues or become a Site Supporter
 



Go Back   6066 (1960-1966) GMC Truck Club > 6066 GMC Truck Club Forum > GMC V6 and V12 Engines


GMC V6 and V12 Engines Engine repair and rebuilding

Reply
 
Thread Tools
  #1  
Old March 15th, 2013, 02:35 AM
tinman64 tinman64 is offline
Junior Member
 
Join Date: Feb 2013
Location: canada
Truck: 1964 1000
Age: 62
Posts: 19
Rep Power: 73
tinman64 is on a distinguished road
Default creative rebuilding

I was wondering if anyone has tried swapping pistons from a different engine into one of these 305 v6's,maybe a BBC,I think they have a 4.25 bore and lord knows you can get them in any shape and size.I know there would be alot of re-balancing but it would open alot of doors when re-building.Bearings may be more of a challange but there might be something out there.I'm sure alot of these engines have been tossed out due to lack of parts
Reply With Quote
  #2  
Old March 15th, 2013, 04:27 AM
bigblockv6 bigblockv6 is offline
Senior Member
 
Join Date: Jan 2013
Location: Rohnert Park, ca.
Truck: 1968 KM2500
Posts: 1,325
Rep Power: 415
bigblockv6 will become famous soon enoughbigblockv6 will become famous soon enough
Default Re: creative rebuilding

The problem with that is you would be dealing with different piston pin height so then custom connecting rods would have to be made up, it be more cost effective just to get custom pistons.
Reply With Quote
  #3  
Old March 15th, 2013, 07:55 PM
GMC-HDV6 GMC-HDV6 is offline
Temporarily Suspended
 
Join Date: Feb 2013
Location: Madison,WI
Truck: 1962 GMC dually
Age: 43
Posts: 15
Rep Power: 0
GMC-HDV6 is on a distinguished road
Default Re: creative rebuilding

If your going that far you may as well increase the compression ratio form 7.5/7.8 to 1 up to 8.5-9.5 to 1 while your at it. My great uncle said on the farm they stroked the 305 as it had cheaper pistons and easier to come by.

End up being 328 cubes and 8.6:1 once done and with custom ground cam they cranked good power from it as well. Also noted that with limited parts around today it might be an idea if you need to have parts custom made anyway what's a flywheel and custom balancing.

30 years ago they got it to work out great on the 5 him and his brother built.

Just a thought
Mike
Reply With Quote
Reply

Bookmarks

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
rebuilding a 305 v6 Archiver Previous Forum Posts 2 December 20th, 2010 12:36 AM


All times are GMT +1. The time now is 09:00 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd 681711554703|1710446436|0