Yeah, I remember the modems that used the telephone handsets, and the Amiga computers. I remember upgrading to a computer that used a cassette tape for storage and had 4K of RAM. Punch cards were on their way out, but I remember pushing carts of them around. I remember Dynabook. I remember the many message boards, and the start of the internet. I remember the beginnings of Prodigy, AOL, INN, etc. I remember mainframes the size of a room, with python cables as big as my leg. I remember computers running on relays and vacuum tubes, and the transition from dumps to actual displays. I remember the IBM 3-sickly. I remember the first home PCs, buying computer parts individually, DIP switches, and spider-RAM. I remember when the keyboard, serial, and disk I/O required full-length expansion cards. I remember changing from non-programmable BIOS to programming with infrared. I remember dot-matrix printers, and monitors with knobs. I remember 8-inch floppy drives and full-height drives. I remember 10Mb hard drives, MFM, RLL, and SCSI-1. I remember the XT, the C32, the TRS-80, and the PC, jr. I remember Wenden DOS, and the college kid who invented the herc-mono video card. I remember CGA. I remember the various user groups. I remember programming in assembly. I remember cartridge-BASIC and ROM BASIC. I remember Desqview, and the INTUIT word processor. I remember bus networking via BNC. I remember the first computer mouse. I remember when the C language was created, so UNIX could be written. I remember the early days of Microsoft. I remember OS/2. I remember the start of the WWW, and the early RFCs. I remember the development of HTML and DHTML. I remember MUDs and MOOs. I remember when Microsoft released Windows 1.0. I remember before Google and MSN and Yahoo and Amazon and YouTube. I remember 8-track, and reel-to-reel. I remember the development of the TCP suite. Sorry for the tangent.
I also remember that many people had actual car knowledge. They could look at pistons and tell you what they came out of. They didn't rely on manuals or the internet. People like this are rare, now. Exhaust was bent from straight pipes. I'm not putting down anyone on here, but getting parts at a dealership now is an exercise in frustration. The first person who does a given swap, like you, still has much to figure out the hard way. That's why many shops won't do this work.
I'm curious what intake you have on your 4.3. The 3.4 would suffer from moving the power to the upper RPMs, where ot can't breathe, unless using a better intake.