Build up ???????

[70challengerrt]

Chryco
Do you have to do any removing of material in the block for the 500 or 512 stroker kits?

[Chryco Psycho]

generally yes , Brandon @ 440 says his cranks are already clearanced , but you may need to notch the bottom of the bore for rod clearance depending which rod is used & things will get tight with the oil pick up tube in the 512"

[70challengerrt]

Chryco
Would that  TF 62 grind work with a bone stock 1975 440 motor or do you have another cam that would be better. This is the motor in the car now. The only upgrades are an edelbrock 750 carb and holley donimator intake. I not going to have time to get my other motor together so I was think of changing cams in my existing motor in the mean time.

[Chryco Psycho]

to make the TF 62 grind work you will Have to trim the guides for valve lift , & replace the springs , I would also recommend replacing the valves given the extra spring pressure , to take advantage of the lift I would port the heads also as the the ports really will not effectively flow past .500 lift , so without porting I would look at a lower lift cam with a durtaion to put the power where you want rpm wise & not beat up valve train parts for no gain 

[moper]

70, I picked up the 505 (512 kit) from the shop Saturday. I began my mock up part of the job, and I was impressed. This is the 4.25 stroke and chevy rod pin size with the 7.1 rod. They clear everywhere with no grinding. I have some pics I didnt send them to work so I cant post right now, but it's close ont he pick up boss (close to .040") clearance and it's close ina  couple spots on the counter weights to the main webbing. Those areas I'll clearance for .100" clearance. Otherwise, very impressive. Literally drops right in. I may have a minor issue with the H series rod bearings tho. Clevitte is beginning to irritate me...I have to make sure it's not the rods. We'll see.

[70challengerrt]

With the TF 62 grind would I have to use adjustable lifters or change pushrod legnth? Here are my present plans I am using my 75 440 block in the car. The 452 heads are off and gone in for rebuilding and bowls blended and minor porting.  While its apart I am changing to the TF 62 cam (unless you think af another cam would be better). When reassembling it I will use .20 steel shim gaskets, with the heads being surfaced this should bring me to 9.2-9.5 compression ratio. Holley dominator intake and edelbrock carb. I still want to use the stock exhaust manifolds. I don' run this motor much above 5500 rpms, maybe 5700 max. I have at the begenning of this post but I will refresh that its a challenger with 75 440 bone stock block, 833 OD tranny, 3.54 dana rearend. By the way sorry about I just want to make sure of everything so I am not wrenching on it in summer when I should be driving it.
Thanks
Todd

[Chryco Psycho]

with the Tf cams you need a adjustable rockers & Comps 7442 pushrods as this is a solid grind , with Iron manifolds you want a 112* intake CL , you can contact Steve Slavik @ Lunati [steveslavik@holley.com] to see what he would suggest you cahnge as far as the cam grind , for example you could go to a split profile with TF61 on the exhaust side which would help slightly
 the grind # for that would be    43799-TF62-TF61-12

[70challengerrt]

I finally got ahold of Steve. What do you think?
You need a part number and a grind number when ordering. If you want a
1-bolt cam use part number # 40399. For a 3-bolt cam use part # 43799.
Grind number for either would be TF62/TF61-110. The specs would be
243/247 @.050, .548/.559 lift, 110 lobe sep..

[Chryco Psycho]

that is what I use to order the Ultra Dyne cams