i currently have a 1973 429 i am looking to build a 572 or something close for a mud truck i need to know if this block will work or if i need a 460. i know that the only difference is the stroke but is the block height the same for both engine any help will be appretiated.

 

Was there stroker kit you found advertised as a 572? Just curious where you got this particular displacement from. Most of the larger stroker kits will use a 4.5" crank. Regular bore with this crank gived you around 538CI. If you bore .60 over with a 4.5" stroke you come out around 545. To get to 572 you'd have to be boring to about 4.5" diameter as well. Problem is you don't have enough meat on the cylinder walls unless you have an SVO block. Or maybe they make a crank for regular big blocks which has more than a 4.5" stroke?

I think the most you can squeeze out of a stock big block is 550-560 CI. I just don't like the idea of boring the block that much. Let me know if you've found a bigger crank though, because I want one!

 

Same-o-same-o. Just the crank crank/pin height changes. You have a 460 as far as the bare block knows :] Get a 4.5" crank and go for it.....dont forget to do the ultrasonic thickness (UT or sonic check are other common terms) to check on the bores before you go-for-broke with the hone.

 

Flatlander sales 572 kits. Some of the older blocks can get .080 and beyond, but I doubt a 73 stands much of a chance at being safe past .060.

 

Ive heard of some going .140. Way thin in my book, particrly for a street motor. I wont go over .060 for any thing resembling a streetable motor. My .02 cents.

 

I see a 557 on Flatlander and then a 605 which I believe is SVO only. Am I missing something? 557 is 4.5" stroke bored .80 over if I remember correctly. To be real I don't think anyone will notice the difference in power between a 572 and 557 though. But I personally would prefer to stick to a .60 over bore, a little insurance. Plus if you have to rebuild you still have a little room to clean things up. If you bore .80 over where do you go from there?

OR buy a Lotto ticket and an SVO block.

 

"If you bore .80 over where do you go from there?"

If your biulding a 572 stroker and bore a stock block most would assume you weighed the pitfalls and made a choice. Also your playing with a cheap disposable stock block, its not a huge loss if it gets wasted...and if it is to you....you most likely would have gambled on it....There are some DO blocks that take kindly to .080 and some may not mind .120 over, but again it boils down to doing the UT, deciding what exactly you are working with, and how much risk you are willing to assume.

BTW- Your correct on flatlanders listing of the Ford 460 Block/557 cu. in. (.080 over)
And that is on a ford block. THe 605 and up are on a FMS or IDT block.

Copy of the add from www.flatlanderracing.com

Ford 460 Block/557 cu. in. (.080 over)
All Stroker Kits include Crankshaft, Pistons and Rods

Key Code:
Part # Description
Crank 1 SCAT 9000 series crank w/4.500 stroke Choose numbers from this key code,
and match them to the kit #'s listed
in the table below.

Example:
Crank #1 + Rods #2 + Pistons #6
= Kit #SKF5721

To get maximum HP our of your BB Ford - take a look at our Blue Thunder Heads! ›››

Rods 2 SCAT 4340 H-Beam rod 6.800
Rods 3 Oliver billet rods 6.800
Rods 4 Manley Pro-Series I-beam rod 6.800
Rods 5 Venolia Aluminum rod 6.800
Pistons 6 JE/SRP/Wiseco/Probe/ROSS Forged F/T pistons
Pistons 7 Venolia forged pistons


Kit # Block Crank # Rods # Pistons # Price Minikits
(see below)
SKF5721 460 1 2 6 $1959 $399
SKF5722 460 1 2 7 $1959 $399
SKF5723 460 1 3 6 $2799 $399
SKF5724 460 1 3 7 $2799 $399
SKF5725 460 1 4 6 $2449 $399
SKF5726 460 1 4 7 $2449 $399
SKF5727 460 1 5 6 $2599 $399
SKF5728 460 1 5 7 $2599 $399


-Mini Kit listed Below- Add $399
Speed-Pro/JE Plasma Moly
1/16x1/16x3/16 Clevite Mains #1039P
Clevite Rods #743P
SFI Balancer #BAL-2-3
SFI Flexplate #FP460A

 

This is true Puller, I guess I just prefer to play it on the safe side. The blocks may be cheap but the machine work is not. May as well make is last a while. Would be really nice to get one of the racing blocks but the key words there are: Cha-Ching!

 

Puller motors much like drag racing motors are often "filled" blocks, where the water jackets are partially filled with a cement like goop for strength.

If one is going that route, you can radically overbore the block to the point the cylinder walls are completely gone, grind, machine and weld together liners, then insert them as a complete unit and braze them to whats left of the block.

Radical machinery, but you can get darn close to 600cid that way. I saw this occur once in my life, and it was an amazing thing to watch, actually.

 

My poor old memory is dredging up a magazine article I saw, oh, 8 or 10 years ago where someone used an SVO block and built a 700+ cuber that was making something on the order of 900 hp and 1100 lb-ft torque on pump gas. Can anyone verify this or am I just (mis)remembering?

Brad

 

A FMS or IDT block can be pushed as far as 800+ ci.

From Flatlander again:

Ford 460 SVO Block/806 cu. in. (bored to 4.625)
All Stroker Kits include Crankshaft, Pistons and Rods

Part # Description
Crank 1
SCAT forged billet crank w/6.000 stroke Choose numbers from this key code,
and match them to the kit #'s listed
in the table below.

Example:
Crank #1 + Rods #2 + Pistons #4
= Kit #SKF8061

Rods 2 Oliver billet rod 7.750
Rods 3 Venolia custom aluminum rod 7.750
Pistons 4 Venolia custom piston


Kit # Block Crank # Rods # Pistons # Kit Price $ Add Mini Kit $
SKF8061 460 1 2 4 $5699 $399
SKF8062 460 1 2 4 $5699 $399
SKF8063 460 1 3 4 $5099 $399
SKF8064 460 1 3 4 $5099 $399

 

FRPP #M-6010-A96. It can be had in either 10.320 or 12.000 deck height. It seems to be only available through Raceparts Distribution (704)892-8688.

It says it could have displacements up to 815 ci.

 

I found this information listed elswhere on this forum......copy and paste :]

The FRPP catlog lists two 460 blocks & one 429 block, their suggested cid capacity, recommended maxium stroke, and maximum horsepower. They are :

460 (# M-6010-A460)
Max. cid : 598
Max. stroke : 4.500"
Max. HP@RPM : 1,500@8,000

460(# M-6010-A500)
Max. cid : 537
Max. stroke : 4.000"
Max. HP@RPM : 1,500@9,000

429(#M-6010-A96)
Max cid : 600-815
Max. stroke : 6.000"
Max. HP@RPM : 1,600@7,500

The cylinder bore ranges for those three blocks. For # M-6010-A460 it is 4.360-4.600", M-6010-A500 it is 4.360-4.625", and for M-6010-A96 it is 4.500-4.625".

 

Think stroke not bore. The 460 is one of the best if not the best block for throwing a huge stroke to it. The chevy boys arent even close to this. They have to end with the 502 in the old stock blocks. Ford you can get 593 out of a stock 460 block!
The 572 is a 4.5 bore and 4.5 stroke. The stock deck 10.3 cannot be built to 800 plus. The stock blocks have been know to go .140 over I have only seen a few that could go .110 over with a sleeve or two. I ran a .100 over block for 8 years in my bogger. The SVO can be bored to 4.6 and the IDT can be bored to 4.7 You can run alot more stroke them then the 4.5, we have run 4.6 and 4.75 in these and stock blocks that are highly modified. I agree about the partial fill of the blocks. You can still cool it but you get the rigidness in the lower half of the block. Add 4 bolt main caps or a good main girdle and you can run some pretty stout power through them. After 800 or 900 horse just buy a block for $2000 from IDT. You can get 589 to 593 with a stock block bored .85 over and 4.75 stroke.

 

wow talk about pulling up old stuff this is a 3 yr old thread.