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The reason for the post was, I ran into a chevy 434cid dyno sheet bragging contest @ a local builders shop the other day and got to see the dyno #s on alot of the trucks and rails we run with Every one was over 700 ponies from all different builders with a guy Scott Scharoff< I think that was the builders name not sure of the spelling but sounds like the russian vodka> having built several of the engines, all in the low 700hp range under 8K, It seems that if I step up a class my W5 rig wont be too competitive @ around 600hp, my engine has not been on a dyno so I don't know the real hp of my engine but I think 600 is close, some of the trucks I have already out run in the past but the rails and the light jeeps kick butt, So I have been kickin around what it will take to build a 700hp small bock mopar to compete, I have a good set of W5s that flow 325@ 600 and I dont remember the 700 flow #s but there was a small increase over 600, I don't trust my 40 year old factory block or the 6 other small blocks I have collected to run a bore over 4.06, I have a good 4"light crank and a set of BME 6.123 rods and several solid rollers I can reuse, just lacking a solid game plan, money is a bit tight this year so throwing 12k into a small block is not a smart option, this is a mud motor so the torque needs to be way up with the hp curve

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I do this alot, charge the customer alot less to do the engine before and after, on same dyno to see the gains and find out how much you had from the start.

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I would only use an R block, either R1 if you can find one, or R3. I think there is an R1 on here right now for sale in Tx maybe??

When I do a W5 head, I remove the original seats and replace them because they are prone to moving/falling out!
But I think you have good enough parts (minus the cam maybe) to do what you want, with a little more work.

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R blocks are fine


That said, i like the X blocks, reason being they are stock up top and will accept anybodies roller lifters, which is a plus,(in the 59 degree and roller cam world) and accesories, etc, are plenty beefy to handle anything a 59 degree head can dish out, and are lighter than an R3

Like any block, they should be sonic checked, mine has plenty of meat for another overbore and its currently at 4.100. Like any Mopar blocks, the thickness varies, hence why they all should be checked.I know guys running them at 4.125 even, and making good power with safe bore thickness.

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I would only use an R block, either R1 if you can find one, or R3. I think there is an R1 on here right now for sale in Tx maybe??

When I do a W5 head, I remove the original seats and replace them because they are prone to moving/falling out!
But I think you have good enough parts (minus the cam maybe) to do what you want, with a little more work.

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R blocks are fine


That said, i like the X blocks, reason being they are stock up top and will accept anybodies roller lifters, which is a plus,(in the 59 degree and roller cam world) and accesories, etc, are plenty beefy to handle anything a 59 degree head can dish out, and are lighter than an R3

Like any block, they should be sonic checked, mine has plenty of meat for another overbore and its currently at 4.100. Like any Mopar blocks, the thickness varies, hence why they all should be checked.I know guys running them at 4.125 even, and making good power with safe bore thickness.

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I am not up to par on small block , blocks, is there a thread with a good description of the blocks , years or current availability and how much machine work ya gota do to make some power with one? We had to put a ton of time in money in the 360 block between line hone, steel caps,decking, bushed lifters, oiling mod, ect...

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I am not up to par on small block , blocks, is there a thread with a good description of the blocks , years or current availability and how much machine work ya gota do to make some power with one? We had to put a ton of time in money in the 360 block between line hone, steel caps,decking, bushed lifters, oiling mod, ect...

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Ryan has an excellent FAQ about all this but currently his domain/website is unavailable.

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