I'm going to try those Nascar rods, I will stick with the SD4 crank I have to find a shop that is willing to offset grind for a 47mm journal, I should be able to get up to the 3.5" stroke and be at 3.0L
Such a nice price, 102$ shipped, even if I have to rework them to straighten the bushings, I will be ahead of a new set.
My LQ1 rods, reconditioned because the shop said they were bent after installing the ARP bolts, were $80 a piece, plus the 65$ for ARP bolts, I was out $550, for stock PM rods.
We have 8 good used Pankl I-Beam Connecting Rods with Casidiam Coated Wrist Pins.
6.200" Long -1.975"(for the 1.850" rod journal size)-.903" Wide on the Big End
.700" Wide on the Wrist Pin End
Wrist Pin Size is close to .708"
.537 grams with 3/8" Rod Bolts
I don't have weights of the crankshaft right now, SD4 crank is still in the block until i make space to pull the short block from the car. And I haven't found any info on the marine crank weight, but the parting line looks cast, the last counterweight shows a fairly shallow line, SD4 parting line looks like a forging.
Marine crankshafts existed when the SD4 was introduced, OMC 3.0L 181 engines were released in 1978. Pontiac decided still to have a forging made for the racing engine program, It has radiused counterweights, and SBC width journals .940", the marine has 1.035" width journals.
These Nascar rods should play nice with my SD4 crank better once ground, Once I find a shop and send them my crank I can see what my stroke limit actually is, Maybe I can match the marine 3.6" or end up somewhere between 3.4".
All better than 3".
car.