I've got a couple off questions about the work I would like to do on my challenger to get it ready for next spring. Its a bit about drivetrain, tires, transmission and engine. So I hope it's ok to put these questions in one topic?
My goal is to run low 13's. But first a bit about my car. It's a 1972 318 equiped with a 360 2bbl (previous owner), still got the original 904, 3.55:1 sure grip differential, hooker headers, 245/60/14 kelly charger rear tires (not good I guess). There's a 1968 340 on the way, freshly overbored 30+.
About the transmission, putting in a 727 requires shortening the driveshaft? And is the linkage for the shifter identical? I would prefer to keep the 904, it being a bit lighter and having less drivetrain losses. But should I install a low gear set and go to 3.23:1, keep the 3.55:1 and install a low gear set or keep the 3.55:1 and keep gear ratios stock? Any advice on Torque convertor stall speed? It's a 400 miles round trip to the drag strip (guess I'll stay for the weekend). For the rest just driving around locally 100 miles round trip max.
Then tires, I'm thinking about Cragar series 342 "D window" 16*7 with goodyear 245/50/16 Eagle HP Ultra Plus. Does anyone have a picture off a challenger with that rim? Or can anyone photoshop one? The sidewall is a bit low for acceleration but it's higher performance rubber. Enough to cancel out the higher sidewall?
And about engine.
I was thinking about converting to a hydraulic roller cam, hughes engineering HER1828AL or HER1418AL. Costs a lot, but when comparing the cost difference on the entire project I think it may be worth it. Will I have enough pressure with the KB243 piston? Will it work with the '68 X heads, polished, maybe light porting? Does the powerband match the Edelbrock Performer RPM Airgap?
Big thanks to anyone who can help with these questions. I haven't decided on anything yet. Better to ask questions first about how to do it then ask questions later on how to fix it
Must be pretty clear that I'm kind off new to this thing
