Ok, been a long time since I've really posted on the V8 buick board since going Turbo6 in my Riviera however a local 67 Special Deluxe 4dr has caught my eye. Remembering Hot Rod's "How to Hot Rod Any Engine" article I dug it back up and proceeded to research the idea of a 300 stroker. To recap, idea #1 is the "Monster Motor", which uses stock rods and Jeep 258 I6 pistons trimmed to fit. Idea #2 is Hot Rod's which uses stock rods and Olds 307 pistons trimmed to fit. I didn't like the compression ratio on either of the two engine, especially not the Monster Motor with it's deep in the hole domed pistons, so I came up with 2 more options though they are really just the same thing with slight variations depending on parts. The basis is still a 340/350 crank with turned down mains stuffed into a 300 block. However instead of using 300 rods I pulled all the rod dimensions available for the Rover V8's, Buick oddfire V6, and SBB's. The two variations are between the two different lengths of 350 rods, though both use modern L67 3800 Supercharged pistons. With the early 350 rods the pistons end up 0.009in above the deck and the compression is ~9.75 using a 9.5in deck height. If you run a thick gasket (0.050in) than there is nothing to mess with other than the 0.9400in little ends of the rods need to be bushed for the 0.9054in floating pins of the L67 pistons. If you want to run a thinner gasket, say 0.040, you'd need to mill 0.010in off of the piston crown and it would need to be replacement pistons since the OEM units are coated which ups the compression to ~10.0. However this is a 0 deck motor with near perfect quench specs. The second variation uses the later "capscrew" 350 rods which puts the same L67 piston 0.020in in the hole perfect for steel shim gaskets. This specs out at ~9.8 compression which is pushing the limits of pump gas with a more torque oriented cam. What I like about this combo is that while I can't talk to the durability of the stock 350 rod (though I hear there are forged replacements available) there are more than a few vendors with L67 forged pistons on the shelfs and are available with deeper dishes for lower compression if desired. Another thing is that since the rods are designed for the crank, no need to worry about pushing the pistons into it so no skirt or pin boss machining needed. Now for the disclaimer: I have not tried any of these combo but I have double checked the first two idea's math using my models and they line up. Please try at your own risk. Ask for clarification if you like. Thanks,
I wouldnt mind seeingsomeone using lentz nascar billet rods 6.380 with honda bearings just to see if they could swap in a 340/350 crank and stroke it a bit more over standard btw, good like
