66 305E upgrade HELP!

[old_1966_GMC]

i need to know whats a real good performance stater, fuel pump,altanator,pistons, camshaft and any other parts i may of missed to put on my 305E engine its a 4 speed.also looking for some good working 66 gmc 351M heads to add on

1966 C1500 3/4 ton longbed fleetside sbw

[Corts60]

unfortunately, there really aren't many other options for getting performance out of your 305. Keep in mind these are truck motors that don't spin very high because of heavy crankshafts and a 60 degree design. The "m" heads, different carbs, exhaust and distributor are about all you can do without having custom made parts or some serious machine work. check out
www.thunderv12.com. they did some crazy things but you'll notice the price reflects that as well.

My advice is enjoy it for what it is unless you want to spend big money.

[old_1966_GMC]

so will the remans from autozone do any good like the starter,fuel pump,and the altanater these are non performance just reman replacement parts that pricr arent that bad

[Corts60]

Sure they are fine to replace but why fix it if it isn't broke? It wouldn't hurt to buy them and have them around though...who knows how much longer the V-6 stuff is going to be available. There is basically no desire for them by most car enthusiasts. Just a few of us crazy guys that gotta be different.

[skoffice]

I'd love to be fortunate enough to be different like you guys. I think those engines are just plain neat. And I agree with Corts60, those parts would be very expensive to make from scratch, plus the design of the engine just wasn't made for the performance enthusiast. They were all about torque and lasting as long as they could. If you want more out of it you could try to locate one of the 400+ CI model V-6's. Those have loads of torque.

[old_1966_GMC]

i think im just ganna stay withe the 305 after all the info i got from u guys and research i've been doing but tend to wanna swap carbs withe holley 500 but i just cant find a 2bbl intake manifold no where and sense im a register user i cant post nothin on the wtb threads i will be adding some pic of the old 305 i got on 66 gmc when i get home

the stock single carb takes a a min to get it going

[skoffice]

That's going to be tough to find I bet, but that should open up some more power for you right there if you do find one. Its a shot in the dark but check local scrap yards. I have seen a couple of the V-6's at pick n pull before. I know what you mean, I need to get some funds together and sign up as well!

[old_1966_GMC]

if any knows where i can find one please let know

[old_1966_GMC]

reasons to grabbing replacement parts was to make this thing look good again and make it run like it did when it first came out the factory

[duallyjams]

check out the forum on here http://www.6066gmcguy.org/ do search these guys have reground cams, replaced piston,balanced the rotating assembly, made a 4 barrel intake out of a 2 barrel M intake so you can do upgrades.

[jonzcustomshop]

I have a blown up 351 for parts on the parts board, take a look and see if it has anything you need...

[creep]

If your motor is a 66 you shouldn't need an intake manifold, just the $20 adapter. Does your intake have 3 or 4 carb studs?

[creep]

If it helps, you can see some pics of my swap on page 2 here;
http://67-72chevytrucks.com/vboard/s...d.php?t=354432

[old_1966_GMC]

well here are some pic of my 305 i have in the gmc. Thank for the help creep i found out i do have to rigth manifold to do the swap.

[70BLAZERX2]

check these out and also look in to offenhauser they do have some very odd stuff.

[old_1966_GMC]

im think of stripping the paint off and go with cast iron on the block and some type of black on some of the parts.Just always like the gray and black looks on a engine

[welsh kev]

Once you've junked that original carb and fitted the Holley, you'll be surprised how much better the motor pulls. Some advocate fitting a Pertronix ignition system, but mine still runs stock ignition and she's on the button every time.

[old_1966_GMC]

what about hei distirbutor has and anybody had any luck with them?

[duallyjams]

I did some research on the HEI on ebay and the reviews were not to good.I use and most others use pretronix conversion.

[C-10 simplex]

Originally Posted by Corts60

Sure they are fine to replace but why fix it if it isn't broke? It wouldn't hurt to buy them and have them around though...who knows how much longer the V-6 stuff is going to be available. There is basically no desire for them by most car enthusiasts. Just a few of us crazy guys that gotta be different.

i think these engines are available from Jasper's at about $4500. Just letting everyone know.

Not a bad price when you consider it.

[old_1966_GMC]

whatare good high engine paint from a auto parts store

[skoffice]

I'm not too sure where you can get it but we always use Aerovoe engine paint at the shop I used to be at and it is GREAT paint. I don't recommend Duplicolor. Try to find a set of plaid valve covers maybe, that would look cool with black and gray.

[old_1966_GMC]

i look into the plaid valve cover,what are the factory color for the 305 did they al had th same color or each truck had it own color like my truck facory color was red but i dont know if the blue is oirginal to the engine

[skoffice]

I'm no expert but I think they all had Corporate blue..