Since we're on the subject of blocks, I thought I might launch a query. I
picked up a 3.9 block in a deal last year. The gent that sold it to me said
it was a 4.0. I inspected it pretty closely and found that it had the
beefed up webbing of the 4.0/4.6 and the thick main caps as well. It also
had bosses along the side of the block for crossbolts but they were'nt
drilled and tapped for them. However, it had 5 bolt holes around each
cylinder, 3.9 style rods and 2.3" mains. What is this? A 3.9 1/2?
Greg
-----Original Message-----
From: Ric Smith [mailto:rsmith@coppercom.com]
Sent: Monday, August 28, 2000 8:26 PM
To: 'Jan Ben'
Cc: 'buick-rover-v8@autox.team.net'
Subject: Isky reverse rotation cams
Jan, are you spinning the engine backwards like I am? Obviously reverse
rotation cams don't help a normal motor. Isky does currently stock normal
rotation cams for the 3.5 in about 4 obsolete grinds, mostly on 110 centers.
I had them do a custom grind for me but it was too peaky and the horsepower
peak wasn't that good either so I advise conservative grinds for better
torque. I'd check out RPI in UK for street cams for Rover trucks. Try
www.rpiv8.com. It's good reading all over their site.
I shopped for a 4.6 block for 3 years before I found a shop with just a
block. They had dropped a nut down the intake and trashed one cyl liner. I
paid just under a grand for the block with one hole resleeved and main caps.
No crank, no top end, nothing else. I still need a windage tray for it and
don't want to pay dealer prices. Any suggestions? ric.
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