I ordered a holley 650cfm DP and holley street dominator manifold for my 305 TBI. Also I just installed MSD-8361 pro-billet distributor, 6a ignition box, and blaster 2 coil. What kind of a difference am I gonna see? Power and mileage wise. With the TBI i've been getting 13mpg half street half highway.

http://store.summitracing.com/partdetail.asp?autofilter=1&part=HLY%2D0%2D80783C&N=700+0&autoview=sku
http://store.summitracing.com/partdetail.asp?part=HLY%2D300%2D38&autoview=sku

 

Whoa, that's pretty poor mileage for any 305.

Should be getting around 20 MPG if tuned properly. That carb is a little big for a 305, but shouldn't hurt anything.

 

yea i get like 22-25 but i gots the tpi

 

Yeah no kidding, and believe me I don't drive like half of the 17 year olds i know do. I respect my car, and I know how it runs. I am more of a cruiser myself anyway. I am hoping for better results with the 650, ive done a few little things to my car, mostly parts laying around the garage. Bigger rocker arms, under drive pulleys, and now total MSD setup which I haven't got to really test yet. It all works though, but with the TBI and computer not hooked up wasn't getting any fuel. So I dumped a little bit in and fired it up, was running fine till need more gas.

 

Can I use that same Holley Manifold with my TBI stock unit as long as I buy the adapter plate of course too. Let me know thanks.