:3gears: carmen has blocks and just about everything else u need i had my 425 nail head rebuilt with j&l performance , joe hertz and carmen for some parts great job runs great even found a 342 posi in texas awesome,paul , j&L performance did all the milling and blance-ing & joe and ken, hertz's dyno service 716-652-8203 did all the reasemble and got any parts i needed from carmen like all bearrings for rear end since i got posi i wanted to change everything in rear axle anybody looking for rear axle caseing for ham i have one with 308 gears john :beer
Well, just to let everyone know I received Dan's engine on Feb. 8th. Ist. thing I will be doing is checking. Bores are 4.2475", bored .060" over. Very badly pitted cylinder walls from water intrusion. De-bur inside & outside of block to get rid of sharp edges, casting flash, stress risers etc. Bottom taping ALL threaded holes. Taping for pipe plugs of the proper thickness for the front oil galley plugs. Sonic testing to be done by two separate shops & then evaluating the results. Crank has got some rust on it so may have to be turned. Measured at 2.497" on main journals, .003" clearance. Measured at 2.247" on rod journals, .003" clearance. Before crank is sent out for checking will soften the edges of the main journal oil slots. Teardrop the rod journals. De-bur the crank for stress risers & casting flash, etc. Will have to determine after sonic testing the rest of the reciprocating assembly as far as using the heavy stock parts or going with lighter, stronger components using modern technology. That's all for now. Tom T.
Hey Tom, I'm curious, Do you think there is enough meat left on the cylinder walls to sleeve the cylinders after already being bored .060?
the roller rockers that ta-performance sells are made by t d. guys are running them i heard of no problems.
Dan & Tom, nice to know it's in good hands! Please keep us updated on all the details.:TU: Joe, I think Gary is referring to using the roller lifters/roller cam......they're too heavy for presently available nailhead valve springs.
We will have to see how the sonic testing averages out Jason. Worse comes to worse we will use a smaller bore sleeve so as not to remove too much from the cylinder wall thickness & go with a small stroke to end up with around 400 cubes. The quality of the sleeves also makes a difference on how "Thin" they can be. The longer the rod the less flex/tension on the cylinder walls & along with a longer rod it helps the asthmatic "Nail" in the breathing department. Depending on outcomes will more than likely also add Epoxy to help stabilize the walls near the bottom. All I know is that I would like this "Nail" to run as good as or better than Dan remembers it running when he 1st. got it. Problem is it will probably cost $$$$$$. So, what else is new.
Hi "w", correct on the "problem" with the roller cam/lifter platform. Due to design limits it's difficult at best to "control" the valve train on the "Nails", for both "street & strip" and "strip" only, and we're talking the flat-tappet platform alone!! Mech-roller's would require much more attention for sure. I've had the opportunity to speak with Tom on numerous occasions specific to the valve spring/retainer issue. Thanks, Gary in N.Y. P.S. I would just add here also, that this build is in fairly safe hands at the moment!
