so i have been having issues on my 1990 chevota backfiring up through the carb. i checked for vacum leaks, vacum lines,
checked carb, fuel pressure(fuel pressure regulator), spark, installed new hei distributor from points dist. i finally pulled
my valve covers and found cam lob on #1 cylinder exhaust side not moving, explains backfiring up through the carb witch is exhaust coming up trough the carb, i got a new cam and lifters and already have my radiator, fans and water pump removed, i am gonna attempt to install cam through front of engine with out removing engine from 4runner, by the way my engine is a small block 350, i will post pictures soon......

 

Should be easy if your remove the radiator

What kind of milage are you getting out of the 350 with carb and 700r4, I'm considering doing this and then adding TBI at a later date, I seriously could switch the carbed 350 in on a Saturday and some of Sunday with the lift and tools I have, whereas the FI would take alot longer, I really want a Vortech 350 or a 5.3 out of a newer truck.

let me know, I get about 13-15 out of my current 3vz on 33's and 4.56's.

 

i get round the same 12-15, really haven't paid much attention to gas mileage, i chucked my 3vze when i blew head gasket, here are some pictures of my current cam install
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sorry, posting picture's is a pain in the ass, i tried photobucket
but no luck

 

so i finally removed my camshaft over the weekend and sure enough #1 cylinder exhaust lobe gone!!!!

 

in those pics the cam is still in it lol i want to see it are you gonna upgrade to a different cam summits sells all theirs for the same price am looking for a cam to put in my 350 so if you find something let me know

 

i already install my cam, kinda skipped takin more pic's, i installed a Elgine cam model #e-1019-p, i believe lift is 464, drove it saturday pulls really good at 2500 rpm's, i also replaced timing gears and chain to a double roller set up

 

good choice on the double roller those last forever. for that cam did you do anything with the heads and what heads do you have? am trying to pick a cam and to be honest am kinda lost