45's are too big on a "stock" motor... stick with 40's

Well in that case I'll use the DCOE 40s then.

I have twin 40s on my A14, they are awesome and sound very powerful. Be sure to get 40s with medium size venturis.

I suggest 2" exhaust pipe, good for 100 HP, perhaps you may see 100 HP with the mods you are describing. To give your A14 room to breathe even if you up the power level later, go 2-1/4". Remember that the A14 is only 85 cubic inches.

try kameari carbs -i think they have other goodies too.

just checked kameari carbs do the cams but no stock but check the site anyway.go to datsun/nissan and then to a-series. got h/g,cams,tie-rods,f/wheel etc

Yeah I was thinking about the exhaust too and I think I'm gonna go with a 2 inch exhaust.I checked the Kameari website and seen some great stuff. B Projects Japan's Ebay store has great stuff too but are kinda expensive. I was looking at headgaskets and seen that there are different thickness. How thick should my headgasket be for my build? Also what grade of motor oil do I have to use in the US? I used SAE50 oil in my A15 B310 back home but never knew what oil they used here.

You can use many grades of engine oil (see Nissan Oil Specs). Generally 10W-40 or 15W-50 is recommended today. It is much better than a single weight like 50W, both for power, economy and engine wear. For racing (sustained high temps) use a synthetic oil.

Where is "back home"?

I'm from Trinidad and Tobago in the Caribbean. BTW does anyone know where I can get Kingsprings for a Datsun 210 in the US or do I have to get it from Australia or the UK?

King a a local Australian company. In the USA we have many, many, spring companies that will make you springs for any application you want. I would start with Quickor in Portland. Oregon. They were the Datsun specialists in the days of Datsun and still make springs to order.

Hey thanks for the info ddgonzal. Just checked the Quickor website. That will save me the hassle of shipping in kingsprings.