1985 460
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Its Comin Right for us!
Joined: Feb 2005
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From: GA
1985 460
i think this has been covered before...but my question is...
what would it take to be able to use a set of d3 or dove heads on this motor? and what about the interenal/external balance deal...i know this motor has the counterweight on the outside, where as the pre 79's have the sleeve without the weight
reason im asking...im thinking of buying an 85 460 to use the block and such to build a 500+ stroker shortblock to replace my current pre 79 472.ci, and i want to be able to use the same flywheel exhaust intake etc..
would it be easier to just wait until i find an earlier block?
what would it take to be able to use a set of d3 or dove heads on this motor? and what about the interenal/external balance deal...i know this motor has the counterweight on the outside, where as the pre 79's have the sleeve without the weight
reason im asking...im thinking of buying an 85 460 to use the block and such to build a 500+ stroker shortblock to replace my current pre 79 472.ci, and i want to be able to use the same flywheel exhaust intake etc..
would it be easier to just wait until i find an earlier block?
Cargo Master
Joined: Dec 2003
Posts: 2,735
Likes: 38
From: Sunny Florida
Not sure if you can use the same push rods or not with the head swap but the flywheel will have to be balanced for the external set up and it can be done by any shop and the rotating assy. should be balanced during the rebuild anyways or it's good insurance on any performance engine.
As for whats easier is hard to say. If one can find either motor then it's an easy thing to do but if one has to search and or pay big bucks to find something they don't have then staying with what one has may be the best route. You will have to break done the cost of each option in order to answer that.
If you want to know which block to use either will be fine for the HP numbers you're after.
As for whats easier is hard to say. If one can find either motor then it's an easy thing to do but if one has to search and or pay big bucks to find something they don't have then staying with what one has may be the best route. You will have to break done the cost of each option in order to answer that.
If you want to know which block to use either will be fine for the HP numbers you're after.
Hotshot
Joined: Dec 2003
Posts: 18,423
Likes: 9
From: iowa
an 85 will have a D9TE block and those came with D3VE heads, infact it's possible and actually probably that is whats on the 85 anyway although supposedly there were E5 heads, everyone upto the change to FI that I have seen ran D3VE heads. And you can bolt DOVE heads onto a later block with no problems, and as far as pushrods I always recommend measuring to gt the proper length so you have good geometry which will get you the most out of your cam.
As far as which block to run there is an advantage to running the D9TE blocks on stroker motors, the cylinders are approx 3/16" longer so it helps support the piston better at BDC with the longer stroke and you can run almost all of the aftermarket stroker cranks in that block. About the only thing that is wrong with the deal is the early model stock internally balanced cranks won't fit in those blocks but the aftermarket stuff will.
As far as which block to run there is an advantage to running the D9TE blocks on stroker motors, the cylinders are approx 3/16" longer so it helps support the piston better at BDC with the longer stroke and you can run almost all of the aftermarket stroker cranks in that block. About the only thing that is wrong with the deal is the early model stock internally balanced cranks won't fit in those blocks but the aftermarket stuff will.
Hotshot
Joined: Dec 2003
Posts: 18,423
Likes: 9
From: iowa
ok if you are stroking it you are going to have to have it balanced with that flywheel anyway and most of the stroker cranks balance either way but they are cheaper to balance externally. rough guess to internally balance it will cost you around $500 with your current flywheel but with that said the balance is going to cost you the same no matter which block you use if you buy an aftermarket crank.
Cargo Master
Joined: Dec 2003
Posts: 2,735
Likes: 38
From: Sunny Florida
One thing to keep in mind is an internal balanced crank will not fit in the D9 up blocks. The external balanced engines recieved smaller throws on the crank so the D9 block does not have enough clearence for the early internaly balanced crank.
Hotshot
Joined: Dec 2003
Posts: 18,423
Likes: 9
From: iowa
RTM that is true but all the aftermarket stroker cranks are setup on the same crank throws as the externall balance cranks so they will fit in any of the blocks. And since he was mentioning a 500+ cid stroker I am assuming tht is the route he is going. With the cost of new cranks anymore it's not worth the cost to offset grind a factory one, plus about the farthest you can go with an offset ground crank is 4.14 where as the aftermarket cranks are easy to find clear to 4.5" stroke, and I just saw one of the new Forged cranks on ebay yesterday any stroke to 4.5 for $575 buy it now price.
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Cargo Master
Joined: Dec 2003
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From: Sunny Florida
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