Hello Ian,
In the US, 3.9 blocks aren't exactly falling off of trees. Good
used ones are expensive. The cheapest rebuildable 3.9 I've seen was
around $600. They generally go for more than that. Also, if one can
get a good Buick or Olds block, they can be had for around $75, bare,
but are obviously inferior to the newer Rover items. Last time I
checked, sleeving a 215 or 3.5 out to the 3.7" bore ran $100 a hole.
(Thats what I was quoted anyway) So... when the cost of sleeving, any
other required machine work, new pistons and other parts are added up,
the new short blocks tend to win in terms of cost effectiveness over
here. That is, in the US. Then, if one has a Buick 300 crank cut for
stroking, add that cost and the cost of a custom flywheel ($250) and a
rear seal adapter, I don't know... that cross bolted 4.6 looks better
and better. Love to see one of those in a 63 Buick Special :-)
Greg
Subject: Re: Re[5]: Performance Questions
Author: Ian Crocker <ian@btcase.bt.co.uk> at inetmail
Date: 9/3/98 10:33 AM
> Brand new 3.9L (98) spec. Short Block , =A3 695.00 =3D $1165
> Brand new 4.6L cross-bolted V8 Short Block, =A31275.00 =3D $2137
> =
>
> Just slap on your heads and intake and go!
The new blocks need the new head castings if you are to maintain a decent
compression ratio. The 4.6 is only rated for 5500rpm. You can build up
a higher spec unit from an old block for a similar cost to the new stuff.
Ian
--
"He began by pitying him for his sufferings, while exhorting him to rejoice
in them, since it was the will of the Lord." - Flaubert (Madame Bovary)
Ian Crocker ian@btcase.bt.co.uk http://www.geocities.com/MotorCity/9190/
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