Every warehouse in the country that sells Sealed Power will have a set of 4040M-10s "on the shelf". The Speed Pro 113R is the "race" bearing. Yes, they ARE different. The race bearing has a different overlay and will live longer under HARD usage, where the "standard" bearing will live longer under "normal" (includes spirited street/strip) driving.
Oil pump is Melling M54D-S. That's the "60 lb" pump. Get a new driveshaft too (IS-54-A).
We use King rod bearings these days. Availability can be "spotty". Federal Mogul 1555CPA-xxx is also a good bearing. You don't need "narrowed" bearings unless you've had "special" crank work done. A largee-than-stock radius in the fillets can require the "N" type. Never heard of a "tapered" rod bearing... "Chamferred" maybe? Functionally equal to "narrowed".
Jim...
Couple of quick questions...
I agree with the bearing issue, but for the extra price, would the better material in the severe duty race bearings be better/worse for normal street use? Would tolerances be tigher or the same as "run of the mill" bearings?
I have always used high pressure Melling pumps. Any significance over high volume or a standard volume pump?
I have rebuilt a few motors in my day and never asked these questions...Just going with a old timers opinion.
Thanks!
