Hi Sid, I'm Mike. The truck was a 1974 Ford XB Ute aka Ford Ranchero in South Africa. Motorsport South Africa will create a new class for it I'm told because of the "uniqueness". Chassis is tubing/Carbon on Aluminium honeycomb hybrid, Simply put it's a Carbon tub built into a Nascar style chassis. Body is all Carbon/Nomex honeycomb (although only the hood is made at this stage) and it will have all sorts of aerodynamic tweaks on it. Then there's the twin turbo Ford V8. Our LSR is small, probably as big as cricket is in the States. Not much going on really but it's starting to grow. It's a low car. I'm 5'7" and the roof is level with my chest. I did post pics earlier of the truck body before I molded it but here's a Photoshop example of what it should look like.
I think I can see an XB Ute there Mike, that's bad ar$e Mate. Lol on the cricket thing.
I've been doing turbo'd $hit on a lunch money budget for a while now, my latest build is a KB with a pair of 133mm Garrett's that came off a 16V-149 Detroit.
Let's see if we can help you get around some of the turbo mystery here.
The first thing you need is a good turbo calculator & I found one online a few years ago that is easy to use & also has a really good gearing calculator in the side bar too.
http://www.squirrelpf.com/turbocalc/I like to work with Garrett stuff as a guide, they are easy for me to ID.
The turbos on my KB for example are GT5533's & to break that down,
GT=Garrett Turbo
55= series number
33= 133mm exducer, thats the OD of the compressor wheel.
At a "rough" guess a 351 would use a pair of GT3271's. 71mm wheel.
Now you basically have the size turbo you need X2 so you can junkyard hunt with a caliper or web search the Garrett number to find out what engine that was fitted to. Probably a diesel.
The A/R numbers on compressor & turbine housings are "area ratio", the bigger the number, the slower it will spool up. Garrett will have different A/R housings available for series number turbos if you need to fine tune once you're up & running.
This is a backyard method that works for me, so all you "Expert's" out there that know better, stick it in your ear!!
I just got called out on a breakdown so I've gotta go to work. I get back to you on cheap BOV's & wastegates that work.
Sid.