by cammerjeff » Sat Aug 24, 2013 3:43 pm
I agree that it would be a Cool conversion, but would require alot of fabrication work. Also keep in mind that all Northstar engines are prone to the head bolts "pulling out" of the block. Usually around 80,000 to 120,000 miles. There has been alot of speculation of the cause, but it seems to be disimaler metal corosion between the steel Head bolts and the Aluminum threads in the block. It can be repaired by adding inserts to the block, but that requires the heads to be removed, and many Aurora and Cadies have been junked because of this issue, as it cannot be performed with the engine in the car. So it is a $2000 or more daller repair bill. Many beleive that the "pink" GM high Milage antifreeze is a contributor to this issue.
So if you do go ahead with it, I would suggest doing the inserts while the engine is on the stand, just for piece of mind.
Just something to consider before taking the plunge on this one.
Jeff R
1971 Catalina Freeway Enforcer
77 Astre Formula, some day soon powered by a 215 Buick V-8
1973 4-speed Lemans Safari STOCK!!!!! 1978 Catalina Safari
2006 Mallet Solstice, 6.0 LS2, 6-speed manual
2009 Solstice Coupe, 2.4, 5-speed Manual