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201fireman

383 or Big Block

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I am looking for more so I started working up plans to up my 355 to a forged 383 to push the 500HP mark.  While I was looking up AFR heads and a rotating kit, my buddy asked why I don't just go to a big block.  It totally got me thinking but I am not sure what the better option would be. Any thoughts or experiences?

Another question. If I go with a 383, will a 2 bolt support 500HP or would you go to a 4 bolt block or drill my current one to a 4 bolt?

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A 2 bolt big block or small block will take 500hp. 

Do you have a big block? If not, added expense.

New headers, pulleys, brackets, plug wires etc. Possible new exhaust depending on what you have now. 

Trans? 350? 400? Big block- highly recommend th400. 

383 is a very nice engine.can make great power and depending on the other things, can be cheaper.

496- stroked big block= torque monster! 

All depends on your budget and your plan for the car. Cruiser, street/strip, etc. 

 

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Decide your goals.

Lots of power in a 383. If you are not going to turn it hard your stock block with main studs should work. You should have the mains line honed with new studs.

You will have to clearance the block at the pan rails. The oil pan will need to replaced with a 400 or aftermarket  pan. The assembly will need to be balanced with a 400 balancer and ring gear. You probably will not need to worry about it but with real high lift cams you need to check clearance between the lobes and connecting rods.I figure that you are planning a cruiser so keep the compression in check, aluminum heads will help don't go with giant ports. Retrofit roller cam would be good.

A big block really fills up that engine bay!  You need to figure all the accessory drives will have to be sourced, not a lot of that stuff left in junk yards.

But I love big blocks!

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I've thought of changing my 355 to a 383 stroker, since I have a given 427BBC to me,(was a blower motor) that's what is going in mine. keeping it old school (.550" lift cam) and adding EFI with a built turbo 350 and 3:73 gears( bolt -in ford 9"). Had this set-up in a '72 Nova way back in '84 ,and just had a great time in that car for some time. Of coarse it had 4:10 gears with 12" wide,(tubbed)31" tall treaded dirt car tires on it for traction. back then N.C. was pretty lenient on tires. I believe the 3:73 gear will give me a little better street manners. 383's are quite the torque motor and are a good fit for our "big" cars. remember you also have to not the bottom of the cylinders for the rods to clear. You can go different on the heads too.AFR are expensive. just go with 64cc chamber with 2.020" /1.600" valves. make sure they are stainless valve and have hardened exhaust seats for unleaded fuel. Performer RPM intake and 750 will work well.post-259-0-61935100-1474727657_thumb.jpg 

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I had a small block 400 in my 1970 that I enjoyed for almost 200k miles. It finally gave up the ghost and I swapped over to a 454 and never looked back. The 400 had excellent torque and was a lot of fun but the torque from the 454 was light years ahead. If you do decide to swap your best bet is to get one from a truck. The brackets will be the same and if it's a 2wd you can use the 400 transmission also. You will need a different input shaft for the driveshaft because the truck uses a bolt in shaft. Denny's driveshafts makes them. You will also need to shorten the driveshaft. The holes are in the frame for when you slide the same transmission cross member back for the longer 400 transmission.  The frame mounts are the same. You will need a larger radiator. Having said all of that the 383 has been built for years and there are many recipes out there for the power level that you want. 

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