Originally Posted by Wile E. Coyote Jr.
Fel-pro MLS gaskets are a good bet when it comes to head gaskets.
For my engine build I am using sealed power main bearings and clevite rod bearings. Teksids are great (its what I am building, but its staying DOHC), and you can get them cheap from a mark. And from my understanding they, matched with PI heads, will increase compression more than PI heads to an NPI iron block. Good for a nitrous build
Yes, NPI had less dish tan PI pistons, and 4V had even less dish than NPI. I think PI heads on a 4V shortblock gets you in the ballpark of 11.3:1 compression. You don't want to do that with a Supercharger though unless you're running very high octane or E-85, and you still wouldn't want much boost due to the higher compression. PTV clearance is an issue on PI swapped 4V shortblocks, and you will need to notch the pistons for the valves. Trickflow heads may resolve that due to how their valves are positioned, but I'm not 100% sure about that.
For a supercharged motor, I'd go lower compression personally. Since the blower compresses the fuel/air mixture already, you don't need high static compression to make more power.
97 Thunderbird LX (The GT Bird)
PI Swapped NPI motor with some port work on the heads, PI cams, 80mm MAF, CAI that feeds from fenderwell. Jmod, 3.73:1 TL in Mark VIII carrier, Mark VIII aluminum LCAs, 93 Mark VIII driveshaft, PBR brakes (soon to be Cobras), 18x9 wheels, 255/40/ZR18 Tires, Front and Rear strut/shock bracing, GR-2 shocks, Eibach 1.5" springs, 1989 SC front and rear sway bars.