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I have a 468 Chev BB pro built Comp. ratio 10.5 to 1...roller cam
and all goodies.....Would like to install a 671 gmc blower on this
engine, and realize that adjustments must be made..Could someone
tell me exactly what I would have to replace, and would it be worth
the cost VS buying another block and starting all over..............
thanks R. Dobbs
Here's a list of recommendations from Blower Drive Service to get you started...
http://www.blowerdriveservice.com/recommend.php
Then on to the tech charts.......
http://www.blowerdriveservice.com/techcharts.php
And common questions.....
http://www.blowerdriveservice.com/faq.php
Pat McCarthy should be along shortly to fill in the blanks.....
Plan on lowering the compression to at least 8-1, your cam will need extra duration and lift on the exhaust side and no tight lobe seperation. Timing will need to go back 2-4 degrees and good rods are mandatory.
Nothing looks as bitchin as a blown BB!!
if the blower is loose and the cam has some over lap on a 108 or 110 you can run 10.5 if you run a msd boost master i have that much cr in the chevy with the 548 it works and other bbc i have done it works very good .you spin the small blowers hard to make up for lower cr and the big cid you just build heat