After much research and my own observations, I'm still stumped on the best 2f engine block/head/carb/intake combinations. I'll be scouring all sources I can find for some answers, but am basically at the mercy of this forum, please help, and sorry about the length!!! Here's what I'm trying to do: build the best performing 2F engine (well-rounded performance) out of parts I have or can get for reasonable prices. The truck is an '75 fj40, so should be smog exempt in CA (I want to completely desmog this truck properly). I'm adding 2-pc headers, K&N filter, and am trying to improve compression/performance in combustion. I don't have the money for ceramic MAF headers right now, so that is out unless other's believe it is essential. Engines I have: '75, 60k '77 (original engine - I just am titling the truck as a '75), 60k '83 engine, 110k and 150k '83 engine, and 150k '86 and '87 engines. I have heads, pistons, and carbs for all the above 2F engines and a 200k '67 F head; and am willing to shed the cash for a late '73 or '74 F head (to improve compression while keeping the oiling passages the same with a 2F block. Unless anyone knows if I rebuilt the '67 head I have that it'll fit on the 2F block with easy modifications. Which Air Intake and intake manifold to use? F engine (the big bowl type one) or 2f? I can't find any information on the facts about either. Which carb to use? I'm pretty decent at rebuilding the aisans and prefer them. But which year? I have a '75 body, a good '77, and all years of the later 60 carbs. And last but not least, which block? Go with the '77 with the domed pistons, or put in the an '83 block with a '74 head - keep the flat pistons or put in the domed ones? I've read that the later fj60 blocks tend to have more efficient combustion chambers, but the domed pistons in the mid seventies trucks yield better compression boosts with a F head. Any ideas? Does anyone know when I'm done, will this truck require premium fuel to keep pinging down? I'd rather keep it at super or under if possible. I'll put in colder plugs and set the advance to the standard 15 degrees (it's the only mark on my flywheels I can actually see). I am trying to avoid a complete rebuild, but will if required, I want this to run like a new truck (esp. since it originally has only 60k on it). Just any help or advise is appreciated. Many will think that my efforts at building the "perfect" engine are wasteful, but I've dedicated a good two years of my life (solid) towards this project and want to have a shiny example of what one of these marvels can do... Also, will my boosted performance cut down on engine life with the boosted compression? If so maybe I should have just gone the 350 route... I'll be swapping in 60k 3.73 thirds and eventually an h55f soon as I get the spare cash. I'll also be adding power steering (either fj60 or mini truck box) and 33 inch tires. I'll also be rebuilding my FJ60 with the complete 60k drive train I have and the next lowest mileage '83 2f smogged engine. Any engines and parts I have and don't need are to be sold, if interested in anything just let me know - I list of lot of items on ebay as well. Thanks for any replies!!!